C++实验代码

C语言实验报告实验1—1：hello world程序:源代码：＃include〈stdio.h>main（){printf（”hello world!\n”);system（”pause");｝实验1—2：完成3个数据的输入、求和并输出计算结果的程序:源代码：＃include<stdio。

h〉main（){int i,j,k，sum；scanf("%d%d％d",＆i，＆j，&k）;sum=i+j+k;printf("sum=%d",sum）；system（”pause”);实验1—3:在屏幕上输出如下图形：ABBBCCCCC源代码：＃include<stdio。

h〉main()｛printf(” A\n”）；printf(" BBB\n”);printf(” CCCCC\n"）;system(”pause");｝实验2—1:计算由键盘输入的任何两个双精度数据的平均值源代码：＃include〈stdio.h〉main(){double a，b；scanf("%lf％lf”,＆a，＆b）；printf（"%。

1lf\n”，（a+b)/2);system（”pause”）；｝实验2—2：写一个输入7个数据的程序,把输入的数据代入a + b * （c – d ) / e * f – g 表达式进行运算源代码：＃include<stdio.h〉main（)｛float a,b，c,d，e,f，g，x；scanf("％f%f%f％f％f%f％f”,＆a，＆b,&c，&d,＆e,&f，＆g);x=a + b ＊（c - d ）/ e ＊f - g;printf(”x=％f”，x)；system("pause"）;｝实验2-3：编写一个C语言程序，测试下列各表达式：i，ji + 1 , j + 1i++ , j++++i ，++ji+++++j源代码：#include<stdio。

C语言实验指导书的程序编码C语言实验程序编码1.平面上两点间的距离#include#includeint main(){double a1,a2;double b1,b2;double distance;printf("please input value a1 and a2:\n"); scanf("%lf%lf",&a1,&a2);printf("please input value b1 and b2:\n"); scanf("%lf%lf",&b1,&b2);distance=sqrt((a1-a2)*(a1-a2)+(b1-b2)*(b1-b2));printf("%lf\n",distance);return 0;}2.#include#includeint main(){double a1,a2;double b1,b2;double distance;printf("please input value a1 and a2:\n");scanf("%lf%lf",&a1,&a2);printf("please input value b1 and b2:\n");scanf("%lf%lf",&b1,&b2);distance=sqrt((a1-a2)*(a1-a2)+(b1-b2)*(b1-b2));printf("%lf\n",distance);return 0;}3.#include//int 占用四字节的32位机#define LOW16 0xFFFFint main(){unsigned int A=0,B=0,C=0,t=0;char hex[33]={0};printf("Please input two unsigned int A and B: "); scanf("%u%u",&A,&B);C=A & LOW16;C<<=16;C |= (B>>16) & LOW16;printf("A=0x%08x\n",A);printf("B=0x%08x\n",B);printf("C=0x%08x\n",C);return 0;}4.#include#includemain(){double x1,y1;double x2,y2;double s;printf("please input a point a:\n");scanf("x1=%lf,y1=%lf\n",&x1,&y1);printf("please input the orther point b:\n");scanf("x2=%lf,y2=%lf\n",&x2,&y2);s=sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2));printf("平面上任意两点间的距离：%lf\n",s);return 0;}5.#includevoid main(){int i,head,foot,rabbit,chick;printf("Enter the 2 numbers :");scanf("%d%d",&head,&foot);printf("head=%d,foot=%d\n",head,foot);for(i=0;i<=head;i++){rabbit=i;chick=head-rabbit;if(rabbit*4+chick*2==foot)printf("rabbit=%d,chick=%d\n",rabbit,chick);}}6.#include//int 占用四字节的32位机#define LOW16 0xFFFFint main(){unsigned int A=0,B=0,C=0,t=0;char hex[33]={0};printf("Please input two unsigned int A and B: \n"); scanf("%u%u",&A,&B);C=A & LOW16;C<<=16;C |= (B>>16) & LOW16;printf("A=0x%08x\n",A);printf("B=0x%08x\n",B);printf("C=0x%08x\n",C);return 0;}7.#include "stdio.h"main()long int rmb,a,b,c,d,e,f,gw,sw,i;printf("Please enter a number:");scanf("%d",&rmb);if(rmb>0 && rmb<=2147483647){sw=rmb%100;gw=rmb%10;a=rmb/100;b=sw/50;c=(sw-b*50)/20;d=(sw-b*50-c*20)/10;e=gw/5;f=(gw-e*5)/1;printf("$100=%d\n$50=%d\n$20=%d\n$10=%d\n$5=%d\n $1=%d\n",a,b,c,d,e,f);}else printf("Error of money!");return 0;}8.#includevoid main(){float a;printf("请输入成绩a：\n");scanf("%f",&a);if (a>=0&&a<=100){switch((int)(a/10)){case 10:case 9:printf("优\n");break;case 8:printf("良\n");break;case 7:printf("中\n");break;case 6:printf("及格\n");break;default:printf("差\n");break;}}elseprintf("输入错误\n");printf("a=%f\n",a);}9.#include//int 占用四字节的32位机int main(){unsigned int A,B,C;printf("Please input two unsigned int A and B: \n"); scanf("%u%u",&A,&B);A=A<<16;B=B>>16;C=A|B;printf("A=0x%08x\n",A);printf("B=0x%08x\n",B);printf("C=0x%08x\n",C);return 0;}10.#includemain(){unsigned int a,b,c;a=65;b=66;c=67;printf( "a=%c,b=%c,c=%c\n",a,b,c); } 11.#includeint main(){int h,f,x,y;printf( "Input h and f:\n ");scanf( "h=%d,f=%d",&h,&f);y=(f-h-h)/2;x=h-y;printf( "x=%d,y=%d\n ",x,y); return 0;}12.#includevoid main(){int x,y;printf("please enter x,y:");scanf("%d%d",&x,&y);printf("\nx+y=%d\n",x+y);printf("x-y=%d\n",x-y);printf("x*y=%d\n",x*y);printf("x/y=%d\n",x/y);printf("x%y=%d\n",x%y);}13.#includemain(){int h,f,x,y;printf("please input values h and f:\n"); scanf("%d,%d",&h,&f);if (h>0 && f>0){x=(4*h-f)/2;y=(f-2*h)/2;printf("x=%d,y=%d\n",x,y);}elseprintf("input error!\n");return 0;}14.#includeint main(){int i,j,k;for(i=0;i<=100/3;i++){for(j=0;j<=100/2;j++){for(k=0;k<=100;k+=2){if(((i+j+k)==100)&&((3*i+2*j+k/2 )== 100)) printf("%d ,%d ,%d\n", i,j,k);}}}return 0;}15.#includeint main(){int i,j,k;for(i=100/3;i>0;i--){for(j=100/2;j>0;j--){for(k=100;k>0;k-=2){if(((i+j+k)==100)&&((3*i+2*j+k/2 )== 100)) printf("%d ,%d ,%d\n", i,j,k);}}}return 0;}16.#include#include#include//模拟一次投骰子的函数，返回值为0~5，表示骰子的六个面int get_number(void){int num = 0;num = rand() % 6;return num;}main(){int data[6];int i=0;srand(time(NULL));//设置随机数种子for( i=0 ; i < 6 ; i++)//数据初始化{data[i]=0;}for( i=0 ; i<1000; i++)//进行1000次试验{data[get_number()]++;}for( i=0 ; i < 6 ; i++)//统计结果输出{printf("点数为%d的次数为: %d\n",i+1,data[i]);}return 0;}16.1. #include#include#include#includevoid main(){srand(time(NULL));double p1=0,p2=0,p3=0,p4=0,p5=0,p6=0; floati1=0,i2=0,i3=0,i4=0,i5=0,i6=0;for(int i=0;i<1000;i++){if(rand()%6+1==1){i1++;}if(rand()%6+1==2){i2++;}if(rand()%6+1==3){i3++;}if(rand()%6+1==4){i4++;}if(rand()%6+1==5){i5++;}if(rand()%6+1==6){i6++;}}p1=i1/1000;p2=i2/1000;p3=i3/1000;p4=i4/1000;p5=i5/1000;p6=i6/1000;printf("出现1的概率%f:\n",p1); printf("出现2的概率%f:\n",p2); printf("出现3的概率%f:\n",p3);printf("出现4的概率%f:\n",p4);printf("出现5的概率%f:\n",p5);printf("出现6的概率%f:\n",p6);}17.#includemain( ){har string［81］;int i,num=0,word=0;char c;gets(string);for(i=0;(c=string［i］）!=′＼0′;i++)if(c==' '||c==' ')word=0;else if(word= =0){word=1;num++;}printf(″There are %d words in the line.＼n″,num);}18.#include#define N 5void main(){int i,j;float max,min,t,a[N];float pjf,sum=0;printf("please input value a[i]:\n");for(i=0;i<n;i++)< p="">scanf("%f",&a[i]);for (i=0;i<n;i++)< p="">{sum=sum+a[i];pjf=sum/N;}max=min=a[0];for(i=1;i<n;i++)< p="">{if(max<a[i])< p="">{max=a[i];}if(min>a[i]){min=a[i];}}printf("大于平均值的数是：\n"); for(i=0;i<n;i++)< p=""> {if(a[i]>pjf)printf("a[%d]=%5.2f\t",i,a[i]); }printf("\n");printf("排列后的数是：\n");for(i=0;i<n-1;i++)< p=""> {for(j=i;j<n;j++)< p=""> {</n;j++)<></n-1;i++)<></n;i++)<></a[i])<></n;i++)<></n;i++)<></n;i++)<>。

实验数据处理C语言源代码#include#include#include#include#define MAX 20typedef struct wuli{float d[MAX];char name[10];int LEN;float ccha[MAX]; /*残差数组*/float avg; /*data的平均值*/double sx; /*标准偏差Sx*/double DU; /*总不确定度*/}wulidata;wulidata *InputData();void average(wulidata *wl);void YCZhi(wulidata *wl);void CanCha(wulidata *wl);void BZPianCha(wulidata *wl);/*标准偏差*/void BQDdu(wulidata *wl);/*总不确定度*/void rage(wulidata *wl);void output(wulidata *wl);/*----------------------------------------------------------*/void line(){int i;printf("\n");for(i=0;i<74;i++)printf("=");printf("\n");}/*-------------------------------------------------------*/wulidata *InputData(){int i=0,k;float da;char Z=0;wulidata *wl;wl=(wulidata *)malloc(sizeof(wulidata));printf("请为你要处理的数据起一个名字：");scanf("%s",wl->name);printf("\n下面请你输入数据%s具体数值，数据不能超过MAX个\n",wl->name);printf("当name='#'时输入结束\n");do{printf("%s%d=",wl->name,i+1);scanf("%f",&da);wl->d[i]=da;i++;if(getchar()=='#') break;}while(wl->d[i-1]!=0.0&&iwl->LEN=i-1;do{printf("你输入的数据如下：\n");for(i=0;iLEN;i++)printf("%s%d=%f\t",wl->name,i+1,wl->d[i]);printf("\n你是否要作出修改(Y/N)?");while( getchar()!='\n');Z=getchar();if( Z=='y'||Z=='Y'){printf("你须要修改哪一个元素，请输入其标号i=(1~%d)\n",wl->LEN);while( getchar()!='\n');scanf("%d",&k);printf("\n%s%d=",wl->name,k);scanf("%f",&(wl->d[k-1]));}else if(Z=='n'||Z=='N')printf("OK!下面开始计算。

C语言程序设计实验及代码随着计算机技术的快速发展，C语言作为一种高效且强大的编程语言，被广泛应用于软件开发、嵌入式系统以及科学计算等领域。

在学习C语言编程的过程中，进行实验并编写相应的代码是非常重要的一部分，可以帮助我们巩固所学的知识并提高编程能力。

本文将介绍几个常见的C语言程序设计实验，并给出相应的代码示例。

一、实验一：Hello, World!实验目的：熟悉C语言编程环境，掌握简单的编译和运行操作。

实验内容：编写一个简单的程序，在屏幕上输出"Hello, World!"。

代码示例：```c#include <stdio.h>int main() {printf("Hello, World!\n");return 0;}```二、实验二：求两个整数的和与差实验目的：学习C语言中的基本数据类型和算术运算符的使用。

实验内容：编写一个程序，输入两个整数并计算它们的和与差，然后输出结果。

代码示例：```c#include <stdio.h>int main() {int num1, num2, sum, diff;printf("请输入两个整数：");scanf("%d %d", &num1, &num2);sum = num1 + num2;diff = num1 - num2;printf("两数之和：%d\n", sum);printf("两数之差：%d\n", diff);return 0;}```三、实验三：判断一个数是奇数还是偶数实验目的：学习C语言中的分支语句的使用。

实验内容：编写一个程序，输入一个整数，并判断它是奇数还是偶数，然后输出结果。

代码示例：```c#include <stdio.h>int main() {int num;printf("请输入一个整数：");scanf("%d", &num);if (num % 2 == 0) {printf("%d是偶数。

#include <stdio.h>#include <reg52.h>#define uchar unsigned char#define uint unsigned int#define ulong unsigned longulong count,n;uint hthu,tthu,thu,hun,ten,one=0;uint flag=0; /*flag为十万位有进位时的标志位，每当有数字像十万位进位时，flag置1*/uchar codesegments_code[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0xff}; /*定义数码管上0~9以及灭灯*/uchar code scan_bits[]={0x01,0x02,0x04,0x08,0x10,0x20}; /*位选码，从左到右依次为6~1*/void t0_count();void delay_1ms(uint x); /*声明延时1ms*/void display(); /*显示函数*/void main(){TMOD=0x05;/*可以再考虑T1*/TH0=0x00;TL0=0x00;EA=1;ET0=1;TR0=1; /*开计数器C0*/P1=0xff;while (1){display();}}void delay_1ms(uint x){uint t;while (x--){for (t=0;t<120;t++);}}void display(){ uint i;for (i=0;i<=5;i++){P1=scan_bits[i]; /*位选*/count=TH0*256+TL0+flag*65535; /*count为计数值，这里为了突破C0计数65535的限制，采用硬件定时和软件定时结合*/hthu=count/100000;tthu=(count%100000)/10000;thu=(count%10000)/1000;hun=(count%1000)/100;ten=(count%100)/10;one=count%10;switch(i){case 0:P0=segments_code[one];P0=0xff;break; /*选择被选通的位选管，赋值段选码*/case 1:P0=segments_code[ten];P0=0xff;break;case 2:P0=segments_code[hun];P0=0xff;break;case 3:P0=segments_code[thu];P0=0xff;break;case 4:P0=segments_code[tthu];P0=0xff;break;case 5:P0=segments_code[hthu];P0=0xff;break;}delay_1ms(1);}}void t0_count() interrupt 1 /*当计数器1溢出时，数码管第七位显示闪烁的E*/ {flag=flag+1;if(flag==10) /*当计数范围超过十万位时，停止计数，数码管最高位闪动'E'(error)*/{while (1){P1=0x20;P0=0x86;delay_1ms(200);P1=0x00;delay_1ms(200);} }}。

实验项目一C++程序设计初步题目在Visual Studio 2008平台上，用C++语言创建一个控制台应用程序，当其运行时在屏幕上显示“Hello,World!”(参考P15)实验项目二类与对象（1）有以下程序：#include <iostream>using namespace std;class Time //定义Time类{public: //数据成员为公用的int hour;int minute;int sec;};int main( ){ Time t1; //定义t1为Time类对象cin>>t1.hour; //输入设定的时间cin>>t1.minute;cin>>t1.sec;cout<<t1.hour<<“:”<<t1.minute<< “:”<<t1.sec<<endl; //输出时间return 0;}改写程序，要求：①将数据成员改为私有的；②将输入和输出的功能改为由成员函数实现；③在类体内定义成员函数。

然后编译和运行程序。

请分析什么成员应指定为公用的？什么成员应指定为私有的？什么函数最好放在类中定义？什么函数最好放在类外定义？代码：/ 实验_1.cpp : 定义控制台应用程序的入口点。

#include"stdafx.h"#include<iostream>using namespace std;class Time //定义Time类{private: //数据成员为私有的int hour;int minute;int sec;public:void Input(){cout<<"请输入时、分、秒："<<endl;cin>>hour>>minute>>sec;}void print(){cout<<"时间为："<<endl;cout<<hour<<":"<<minute<< ":"<<sec<<endl;}};int _tmain(int argc, _TCHAR* argv[]){Time t1;t1.Input ();t1.print ();return 0;}结果：（2）修改实验1中的学生成绩管理系统，建立类OurClass，实现班级学生信息的输入，排序和输出。

实验一数组、结构体和函数综合编程一、实验目的1.复习数组，结构体和函数的相关知识；2.掌握利用数组存储数据和进行编程的方法；3.进一步掌握函数的编写。

二、实验内容1．学生成绩统计从键盘输入一个班（全班最多不超过30人）学生某门课的成绩，当输入成绩为负值时，输入结束，分别实现下列功能：（1）统计不及格人数并打印不及格学生名单；（2）统计成绩在全班平均分及平均分之上的学生人数，并打印这些学生的名单；（3）统计各分数段的学生人数及所占的百分比。

注：将成绩分为六个分数段，60分以下为第0段，60~69为第1段，70~79为第2段，80~89为第3段，90~99为第4段，100分为第5段。

编程要求：1.较好的用户输入输出提示信息2.使用子函数来实现上述各个功能，并且要使用结构体数组来实现，该结构体中包括学生学号和成绩3.最好不要使用全局变量提示：typedef tagStudent{long num;//学生学号float score;//学生分数}Student;供参考的函数原型如下：/*函数功能：从键盘输入一个班学生某门课的成绩及其学号当输入成绩为负值时，输入结束函数参数：存放学生信息的Student结构体数组函数返回值：学生总数*/int ReadScore(Student stu[]);/*函数功能：统计不及格人数并打印不及格学生名单函数参数：存放学生信息的Student结构体数组整型变量n，存放学生总数函数返回值：不及格人数*/int GetFail(Student stu[], int n);/*函数功能：计算全班平均分函数参数：存放学生信息的Student结构体数组，整型变量n，存放学生总数函数返回值：平均分*/float GetAver(Student stu[], int n);/*函数功能：统计成绩在全班平均分及平均分之上的学生人数并打印其学生名单函数参数：存放学生信息的Student结构体数组，整型变量n，存放学生总数函数返回值：成绩在全班平均分及平均分之上的学生人数*/int GetAboveAver(Student stu[], int n);/*函数功能：统计各分数段的学生人数及所占的百分比函数参数：存放学生信息的Student结构体数组，整型变量n，存放学生总数函数返回值：无*/void GetDetail(Student stu[], int n);2．成绩排名次某班期末考试科目为数学（MT）、英语（EN）和物理（PH），有最多不超过30人参加考试。

C语言程序设计部分实验参考答案实验22-1-2#include <stdio.h>int main(){int c,f=150;c=f*5/9-32*5/9;printf("fahr=%d, celsius=%d\n",f, c);return 0;}思考：不一样结果变为65 因为取整过程不同造成误差2-1-3#include <stdio.h>int main(){int c=26,f;f=c*9/5+32;printf("celsius=%d, fahr=%d\n",c, f);return 0;}#include <stdio.h>int main(){//2-1-4int math=87,eng=72,comp=93;printf("math=%d, eng=%d, comp=%d, average=%d\n",math, eng, comp,(math+eng+comp)/3);return 0;}#include <stdio.h>int main(){//2-1/5int n=152,a,b,c;c=n%10;b=(n/10)%10;a=n/100;printf("整数%d 的个位数字是%d, 十位数字是%d, 百位数字是%d\n",n, c, b, a);return 0;}#include <stdio.h>int main(){//2-1-6int x=3,y;y=x*x;printf("%d=%d*%d\n",y,x,x);printf("%d*%d=%d\n",x,x,y);return 0;}#include <stdio.h>int main(){//2-2-1double x, y;printf("Enter x:");scanf_s("%lf",&x);if(x!=0){y=1/x;}else{y=0;}printf("f(%.2f)=%.1f\n",x,y);return 0;}#include <stdio.h>int main(){//2-2-2int celsius, fahr;fahr=100;celsius=5*(fahr-32)/9;printf("fahr=%d, celsius=%d\n",fahr,celsius);return 0;}#include <stdio.h>int main(){//2-2-3double money, rate,x=1.0;int i,year;printf("Enter money, year and rate:");scanf("%lf %d %lf",&money,&year,&rate);for(i=1;i<=year;i++)x=x*(1+rate);printf("intrest=%.2f\n",money*x-money);return 0;}#include <stdio.h>#include<math.h>int main(){//2-2-4double x, y;printf("Enter x");scanf_s("%lf",&x);if(x<0.0)y=pow(x+1,2)+2*x+1/x;elsey=sqrt(x);printf("f(%.2f)=%.2f\n",x,y);return 0;}#include <stdio.h>#include<math.h>int main(){//2-2-5double x, y;printf("Enter x:");scanf_s("%lf",&x);if(x==10)y=1/x;elsey=x;printf("f(%.2f)=%.1f\n",x,y);return 0;}#include <stdio.h>int main(){//2-2-6int x, y;printf("Enter num1:");scanf_s("%d",&x);printf("Enter num2:");scanf_s("%d",&y);printf("%d+%d=%d\n",x,y,x+y);printf("%d-%d=%d\n",x,y,x-y);printf("%d*%d=%d\n",x,y,x*y);printf("%d/%d=%d\n",x,y,x/y);printf("%d%%d=%d\n",x,y,x%y);return 0;}#include <stdio.h>int main(){//2-3-1int i,sum=0;for(i=1;i<=100;i++){sum=sum+i;}printf("sum=%d\n",sum);return 0;}#include <stdio.h>int main(){//2-3-2int i,m,s=0;printf("Enter m:");scanf("%d",&m);for(i=m;i<=100;i++)s=s+i;printf("sum=%d\n",s);return 0;}#include <stdio.h>int main(){//2-3-3int i,m,n;double s=0.0;printf("Enter m:");scanf("%d",&m);printf("Enter n:");scanf("%d",&n);for(i=m;i<=n;i++)s=s+1.0/i;printf("sum=%f\n",s);return 0;}#include <stdio.h>int main(){//2-3-4int i,n;double s=0.0;printf("Enter n:");scanf("%d",&n);for(i=1;i<=n;i++)s=s+1.0/(2*i-1);printf("sum=%f\n",s);return 0;}#include <stdio.h>int main(){//2-3-5int i,n;double s=1.0,t=1.0,sign=1.0;printf("Enter n:");scanf("%d",&n);for(i=1;i<n;i++){sign=-sign;t=(t+3);s=s+1/t*sign;}printf("sum=%.3f\n",s);return 0;}#include <stdio.h>int main(){//2-3-6int low, uper;double fahr,celsius;printf("Enter low:");scanf_s("%d",&low);printf("Enter uper:");scanf_s("%d",&uper);printf("fahr celsius\n");for(fahr=low;fahr<=uper;fahr+=2){celsius=5.0/9.0*(fahr-32.0);printf("%3.0f %6.1f\n",fahr,celsius);}return 0;}#include <stdio.h>int main(){//2-3-7int m, n, i;double p,sum=0.0;printf("Enter m:");scanf("%d",&m);printf("Enter n:");scanf("%d",&n);p=1.0;for(i=1;i<=m;i++)p=p*i;sum=sum+p;p=1.0;for(i=1;i<=n;i++)p=p*i;sum=sum+p;printf("sum=%.0f\n",sum);return 0;}#include <stdio.h>int main(){//2-3-8int x, n,i;double p=1.0;printf("Enter x:");scanf("%d",&x);printf("Enter n:");for(i=1;i<=n;i++)p=p*x;printf("%d的%d次方是%.0f\n",x, n,p);return 0;}#include <stdio.h>#include<math.h>int main(){//2-4-1int n,i;printf("Enter n:");scanf("%d",&n);for(i=0;i<=n;i++)printf("pow(3,%d)=%.0f\n",i,pow(3.0,i));return 0;}#include <stdio.h>#include<math.h>int main(){//2-4-4double sum=0.0,i;for(i=100;i<=1000;i++){sum+=sqrt(i);}printf("sum=%.2f\n",sum);return 0;}// return 0;}#include <stdio.h>#include<math.h>int main(){//2-2-5double x, y;printf("Enter x:");scanf_s("%lf",&x);if(x==10)y=1/x;elsey=x;printf("f(%.2f)=%.1f\n",x,y);return 0;}#include <stdio.h>int main(){//2-2-6int x, y;printf("Enter num1:");printf("Enter num2:");scanf_s("%d",&y);printf("%d+%d=%d\n",x,y,x+y);printf("%d-%d=%d\n",x,y,x-y);printf("%d*%d=%d\n",x,y,x*y);printf("%d/%d=%d\n",x,y,x/y);printf("%d%%d=%d\n",x,y,x%y);return 0;}#include <stdio.h>int main(){//2-3-1int i,sum=0;for(i=1;i<=100;i++){sum=sum+i;}printf("sum=%d\n",sum);return 0;}#include <stdio.h>int main(){//2-3-2int i,m,s=0;printf("Enter m:");scanf("%d",&m);for(i=m;i<=100;i++)s=s+i;printf("sum=%d\n",s);return 0;}#include <stdio.h>int main(){//2-3-3int i,m,n;double s=0.0;printf("Enter m:");scanf("%d",&m);printf("Enter n:");scanf("%d",&n);for(i=m;i<=n;i++)s=s+1.0/i;printf("sum=%f\n",s);return 0;}#include <stdio.h>int main(){//2-3-4int i,n;double s=0.0;printf("Enter n:");scanf("%d",&n);for(i=1;i<=n;i++)s=s+1.0/(2*i-1);printf("sum=%f\n",s);return 0;}#include <stdio.h>int main(){//2-3-5int i,n;double s=1.0,t=1.0,sign=1.0;printf("Enter n:");scanf("%d",&n);for(i=1;i<n;i++){sign=-sign;t=(t+3);s=s+1/t*sign;}printf("sum=%.3f\n",s);return 0;}#include <stdio.h>int main(){//2-3-6int low, uper;double fahr,celsius;printf("Enter low:");scanf_s("%d",&low);printf("Enter uper:");scanf_s("%d",&uper);printf("fahr celsius\n");for(fahr=low;fahr<=uper;fahr+=2){celsius=5.0/9.0*(fahr-32.0);printf("%3.0f %6.1f\n",fahr,celsius);}return 0;}#include <stdio.h>int main(){//2-3-7int m, n, i;double p,sum=0.0;printf("Enter m:");scanf("%d",&m);printf("Enter n:");scanf("%d",&n);p=1.0;for(i=1;i<=m;i++)p=p*i;sum=sum+p;p=1.0;for(i=1;i<=n;i++)p=p*i;sum=sum+p;printf("sum=%.0f\n",sum);return 0;}#include <stdio.h>int main(){//2-3-8int x, n,i;double p=1.0;printf("Enter x:");scanf("%d",&x);printf("Enter n:");scanf("%d",&n);for(i=1;i<=n;i++)p=p*x;printf("%d的%d次方是%.0f\n",x, n,p);return 0;}#include <stdio.h>#include<math.h>int main(){//2-4-1int n,i;printf("Enter n:");scanf("%d",&n);for(i=0;i<=n;i++)printf("pow(3,%d)=%.0f\n",i,pow(3.0,i));return 0;}#include <stdio.h>#include<math.h>int main(){//2-4-4double sum=0.0,i;for(i=100;i<=1000;i++){sum+=sqrt(i);}printf("sum=%.2f\n",sum);return 0;}实验3#include<stdio.h>#include<math.h>int main(){//3-1double a, b, c, d;printf("Enter a, b, c: ");scanf("%lf%lf%lf",&a,&b,&c);d=b*b-4*a*c;if(a==0)if(b==0)if(c==0)printf("系数均为，方程无意义！\n");elseprintf("a、b为，c不为，方程不成立！\n");elseprintf("x=%.2f\n",c/b);elseif(d>=0){printf("x1=%.2f\n",(-b+sqrt(d))/(2*a));printf("x1=%.2f\n",(-b-sqrt(d))/(2*a));}else{printf("x1=%.2f+%.2fi\n",-b/(2*a),sqrt(-d)/(2*a));printf("x1=%.2f-%.2fi\n",-b/(2*a),sqrt(-d)/(2*a));}return 0;}#include<stdio.h>int main(){//3-2int x,y;printf("Enter x: ");scanf("%d",&x);if(x<0)y=-1;else if(x==0)y=0;elsey=1;printf("sign(%d)=%d\n",x,y);return 0;}#include<stdio.h>int main(){//3-3int letter=0,blank=0,digit=0,other=0,i;char ch;printf("Input 10 characters: ");for(i=0;i<10;i++){ch=getchar();if(ch>='a'&&ch<='z'||ch>='A'&&ch<='Z')letter++;else if(ch==' '||ch=='\n')blank++;else if(ch<='9'&&ch>='0')digit++;elseother++;}printf("letter=%d, blank=%d, digit=%d,other=%d\n",letter,blank,digit,other);return 0;}#include<stdio.h>int main(){//3-4char grade;printf("Input Grade: ");grade=getchar();switch(grade){case 'A':;case 'a':printf("%c对应的百分制成绩区间是~100\n",grade);break;case 'B':;case 'b':printf("%c对应的百分制成绩区间是~90\n",grade);break;case 'C':;case 'c':printf("%c对应的百分制成绩区间是~79\n",grade);break;case 'D':;case 'd':printf("%c对应的百分制成绩区间是~69\n",grade);break;case 'E':;case 'e':printf("%c对应的百分制成绩区间是~59\n",grade);break;default:printf("数据输入错误\n");}return 0;}#include<stdio.h>int main(){//3-5int choice,count;for(count=0;count<5;count++){printf("[1]apple\n");printf("[2]pear\n");printf("[3]orange\n");printf("[4]grape\n");printf("[0]exit\n");printf("Enter your choice:");scanf("%d",&choice);switch(choice){case 0: return 0;case 1:printf("price is %.2f\n",3.0);break;case 2:printf("price is %.2f\n",2.5);break;case 3:printf("price is %.2f\n",4.1);break;case 4:printf("price is %.2f\n",10.2);break;default:printf("price is %.2f\n",0.0);}}return 0;}#include<stdio.h>int main(){//3-6int i;double grade;for(i=0;i<5;i++){printf("Enter grade: ");scanf("%lf",&grade);if(grade<60.0)printf("Fail\n");elseprintf("Pass\n");}return 0;}#include<stdio.h>#include<math.h>int main(){//3-7double a,b,c,s;printf("Enter 3 sides of the triangle: ");scanf("%lf %lf %lf",&a,&b, &c);if(a+b>c&&a+c>b&&b+c>a){s=(a+b+c)/2;printf("area=%.2f; perimeter=%.2f\n",sqrt(s*(s-a)*(s-b)*(s-c)),a+b+c);}elseprintf("These sides do not correspond to a valid triangle\n");return 0;}#include<stdio.h>int main(){//3-8double salary,rate;printf("Enter the salary: ");scanf("%lf",&salary);if(salary<=850)rate=0.0;else if(salary<=1350.0)rate=0.05;else if(salary<=2850.0)rate=0.1;else if(salary<=5850.0)rate=0.15;elserate=0.2;printf("tax=%.2f\n",rate*(salary-850));return 0;}#include<stdio.h>int main(){//3-9int i,n,grade,a=0,b=0,c=0,d=0,e=0;printf("Enter n: ");scanf("%d",&n);for(i=0;i<n;i++){printf("Enter grade %d: ",i+1);scanf("%d",&grade);switch(grade/10){case 9:case 10:a++;break;case 8:b++;break;case 7:c++;break;case 6:d++;break;case 5:case 4:case 3:case 2:case 1:case 0:e++;break;}}printf("The number of A(90~100):%d\n",a);printf("The number of B(80~89):%d\n",b);printf("The number of C(70~79):%d\n",c);printf("The number of D(60~69):%d\n",d);printf("The number of E(0~59):%d\n",e);return 0;}#include<stdio.h>int main(){//3-10char sign;int x,y;printf("输入x运算符y：");scanf("%d%c%d",&x,&sign, &y);if(sign=='*')printf("%d * %d = %d\n",x,y,x*y);else if(sign=='/')printf("%d / %d = %d\n",x,y,x/y);else if(sign=='%')printf("%d Mod %d = %d\n",x,y,x%y);elseprintf("运算符输入错误！\n");return 0;}实验4#include<stdio.h>#include<cmath>int main(){//4-1-2int flag,denominator;double s,eps,item;printf("Input eps:");scanf("%lf",&eps);s=0.0;flag=1;denominator=1;item=1.0;while(fabs(item)>eps){item=flag*1.0/denominator;s=s+item;flag=-flag;denominator=denominator+3;}printf("s=%.6f\n",s);return 0;}#include<stdio.h>int main(){//4-1-3int x,sum;sum=0;printf("Input integers:");scanf("%d",&x);while(x>0){if(x%2!=0)sum=sum+x;scanf("%d",&x);}printf("The sum of the odd numbers is %d\n",sum);return 0;}#include<stdio.h>int main(){//4-1-4int num,count;printf("Input an integer:");scanf("%d",&num);count=0;do{num=num/10;count++;}while(num!=0);printf("count=%d\n",count);return 0;}#include<stdio.h>int main(){//4-1-5int n,x,min,i;printf("Input n:");scanf("%d",&n);printf("Input numbers:");scanf("%d",&x);min=x;for(i=1;i<n;i++){scanf("%d",&x);if(x<min)min=x;}printf("min=%d\n",min);return 0;}int main(){//4-1-6int n,s=0,c=0;printf("Input an integer:");scanf("%d",&n);do{s+=n%10;n/=10;c++;}while(n);printf("count=%d, sum=%d\n",c,s);return 0;}#include<stdio.h>int main(){//4-1-7double a,b,c,s=0.0;int i,n;printf("Input n:");scanf("%d",&n);for(a=1.0,b=1.0,i=0;i<n;i++,c=a+b,a=b,b=c) s+=(1.0+a/b);printf("s=%.2f\n",s);return 0;}#include<stdio.h>int main(){//4-1-8int a,n,i,s=0,t=0;printf("Input a, n:");scanf("%d%d",&a,&n);for(i=0;i<n;i++){t=10*t+a;s+=t;}printf("s=%d\n",s);return 0;}#include<stdio.h>int main(){//4-1-9int n,i;double h,sum=0.0;printf("Input height: ");scanf("%lf",&h);printf("Input n: ");scanf("%d",&n);sum+=h;for(i=1;i<=n;i++){sum+=h;h/=2.0;}printf("distance=%.1f\n",sum);printf("height=%.1f\n",h);return 0;}#include<stdio.h>#include<math.h>int main(){//4-2-2int m,n,i,j,st,c=0;printf("Input m: ");scanf("%d",&m);if(m==1)m++;printf("Input n: ");scanf("%d",&n);for(i=m;i<=n;i++){st=sqrt((double)i);for(j=2;j<=st;j++)if(!(i%j))break;if(j>st){printf("%d ",i);c++;if(!(c%6))printf("\n");}}return 0;}#include<stdio.h>int main(){//4-2-3int money,f1,f2,f5,count=0;printf("Input money: ");scanf("%d",&money);for(f1=1;f1<=money-7;f1++)for(f2=1;f2<=money-6;f2++)for(f5=1;f5<=money-3;f5++)if(f1+2*f2+5*f5==money)count++;printf("count=%d\n",count);for(f1=1;f1<=money-7;f1++)for(f2=1;f2<=money-6;f2++)for(f5=1;f5<=money-3;f5++)if(f1+2*f2+5*f5==money)printf("fen5: %d fen2: %d fen1: %d\n",f5,f2,f1);return 0;}#include<stdio.h>int main(){//4-2-4int m,n,k,a,b,c,tmp;printf("Input m: ");scanf("%d",&m);printf("Input n: ");scanf("%d",&n);for(k=m;k<=n;k++){tmp=k;a=tmp%10;tmp/=10;b=tmp%10;tmp/=10;c=tmp;if(a*a*a+b*b*b+c*c*c==k)printf("%d\t(%d*%d*%d+%d*%d*%d+%d*%d*%d=%d)\n",k,c,c,c,b,b,b,a,a,a,k);}return 0;}#include<stdio.h>int main(){//4-2-5int i,j,s;for(i=1;i<=200;i++){s=1;for(j=2;j<=i/2;j++)if(i%j==0)s=s+j;if(s==i){printf("%d=1",i);for(j=2;j<=i/2;j++)if(i%j==0)printf("+%d",j);printf("\n");}}return 0;}#include<stdio.h>//5-2int sign(int x){if(x>0)return 1;if(x==0)return 0;return -1;}int main(){int x;printf("Enter x:");scanf("%d",&x);printf("sign(%d)=%d\n",x,sign(x));return 0;}#include<stdio.h>//5-3int even(int x){return (x%2==0);}int main(){int x,s=0;printf("Input integers: ");scanf("%d",&x);while(x>0){if(!even(x))s+=x;scanf("%d",&x);}printf("The sum of the odd is %d\n",s);return 0;}#include<stdio.h>//5-4#include<math.h>double distance(double x1,double y1, double x2, double y2){ return sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2));}int main(){double x1, y1, x2, y2;printf("Input (x1, y1):");scanf("%lf%lf",&x1,&y1);printf("Input (x2, y2):");scanf("%lf%lf",&x2,&y2);printf("distance=%.2f\n",distance(x1,y1,x2, y2));return 0;}#include<stdio.h>//5-5#include<math.h>int prime(int m){int k,sqrtm=sqrt((double)m);for(k=2;k<=sqrtm;k++)if(m%k==0)return 0;return 1;}int main(){int m,n,c=0,s=0,k;printf("Input m:");scanf("%d",&m);printf("Input n:");scanf("%d",&n);for(k=(m==1?2:m);k<=n;k++)if(prime(k)){c++;s+=k;}printf("count=%d, sum=%d\n",c,s);return 0;}#include<stdio.h>//5-6int countdigit(int number, int digit){int c=0;if(number<0)number=-number;do{if(number%10==digit)c++;number/=10;}while(number);return c;}int main(){int n;printf("Enter an integer:");scanf("%d",&n);printf("Number of digit 2: %d\n",countdigit(n,2));return 0;}#include<stdio.h>//5-7int is(int n){int s=0,x,m=n;do{x=m%10;s+=x*x*x;m/=10;}while(m);if(s==n)return 1;return 0;}int main(){int m,n,i;printf("Input m:");scanf("%d",&m);printf("Input n:");scanf("%d",&n);for(i=m;i<=n;i++)if(is(i))printf("%d\n",i);return 0;}#include<stdio.h>//5-8double fact(int n);int main(void){int i;double sum=0.0;/*需要初始化为*/for(i=1;i<=10;i++)/*上界是*/sum=sum+fact(i);printf("1!+2!+...+10!=%f\n",sum);return 0;}double fact(int n){int i;double result=1.0;for(i=1;i<=n;i++)result=result*i;/*result中累积n!*/ return result;}实验7#include<stdio.h>int main(){//7-2-4int a[6][6],n,i,j,flag=1;printf("Input n:");scanf("%d",&n);printf("Input array:\n");for(i=0;i<n;i++)for(j=0;j<n;j++)scanf("%d",&a[i][j]);for(j=0;j<n-1;j++){for(i=j+1;i<n;i++)if(a[i][j]){flag=0;break;}if(flag==0)break;}if(flag==0)printf("No\n");elseprintf("Yes\n");return 0;}#include<stdio.h>int main(){//7-2-6int a[6][6],n,i,j,row,col;printf("Input n:");scanf("%d",&n);printf("Input array:\n");for(i=0;i<n;i++)/*输入矩阵*/for(j=0;j<n;j++)scanf("%d",&a[i][j]);for(i=0;i<n;i++){/*对矩阵的每一行*/row=i;col=0;for(j=0;j<n;j++)/*找当前行的最大值元素a[row][col]*/if(a[i][j]>a[row][col]){col=j;}for(j=0;j<n;j++)/*检测a[row][col]是否为第col列的最小元素*/ if(a[j][col]<a[row][col])break;if(j>=n){//找到鞍点元素a[row][col]printf("a[%d][%d]=%d\n",row,col,a[row][col]);break;}}if(i>=n)/*所有行都检测过没有找到鞍点*/printf("NO\n");return 0;}#include<stdio.h>int main(){//7-3-2char c,s[80];int i,index=-1;printf("Input a character:");c=getchar();getchar();printf("Input a string:");gets(s);i=0;while(s[i]!='\0'){if(s[i]==c)index=i;i++;}if(index>-1)printf("index=%d\n",index);elseprintf("Not found\n");return 0;}#include<stdio.h>int main(){//7-3-3char s[80];int i,upcase=0,count=0;printf("Input a string:");gets(s);i=0;while(s[i]!='\0'){if(s[i]>='A'&&s[i]<='Z'){upcase++;switch(s[i]){case 'A':case 'E':case 'I':case 'O':case 'U':count++;}}i++;}if(upcase)count=upcase-count;printf("count=%d\n",count);return 0;}#include<stdio.h>int main(){//7-3-4char s[80];int i;printf("Input a string:");gets(s);i=0;while(s[i]!='\0'){if(s[i]>='A'&&s[i]<='Z')s[i]='Z'-(s[i]-'A');i++;}printf("After replaced: %s\n",s);return 0;}#include<stdio.h>int main(){//7-3-5char s[80];int i,n=0;printf("Input a string:");gets(s);i=0;while(s[i]!='\0'){if(s[i]>='0'&&s[i]<='9'){n=n*16+s[i]-'0';i++;continue;}switch(s[i]){case 'a':case 'A':n=n*16+10;break;case 'b':case 'B':n=n*16+11;break;case 'c':case 'C':n=n*16+12;break;case 'd':case 'D':n=n*16+13;break;case 'e':case 'E':n=n*16+14;break;case 'f':case 'F':n=n*16+15;break;}i++;}printf("Hex=%d\n",n);return 0;}实验8#include<stdio.h>//8-1-1void move(int *, int, int);int main(){int m, n, i, a[80], *p;printf("Input n, m:");scanf("%d%d",&n, &m);for(p=a,i=0;i<n;i++)scanf("%d",p+i);/*将&p++换成p+i*/ move(a,n,m);printf("After moved:");for(i=0;i<n;i++)printf("%5d",a[i]);return 0;}void move(int *x,int n, int m){int i,j,k;for(i=0;i<m;i++){k=x[n-1];/*暂存x[n-1]，因为它将被覆盖*/for(j=n-1;j>0;j--)x[j]=x[j-1];/*设置断点*/x[0]=k;}}#include<stdio.h>//8-1-2#include<stdlib.h>int search(int *, int, int);int main(){int *a,n,i,x,index;printf("Input n:");scanf("%d",&n);if((a=(int*)malloc(n*sizeof(int)))!=NULL) exit(1);printf("Input %d integers:",n);for(i=0;i<n;i++)scanf("%d",a+i);printf("Input x:");scanf("%d",&x);index=search(a,n,x);if(index==-1)printf("Not found\n");elseprintf("index=%d\n",index+1);free(a);return 0;}int search(int *a,int n,int x){int i;for(i=0;i<n;i++)if(a[i]==x)return i;return -1;}#include<stdio.h>//8-1-3#include<stdlib.h>void sort(int*,int);int main(){int i,n,*a;printf("Input n:");scanf("%d",&n);if((a=(int*)malloc(n*sizeof(int)))!=NULL) exit(1);printf("Input %d integers:",n);for(i=0;i<n;i++)scanf("%d",a+i);sort(a,n);printf("After sorted the array is:");for(i=0;i<n;i++)printf("%d ",a[i]);printf("\n");return 0;}int max(int *a,int n){int i,index=0;for(i=1;i<n;i++)if(a[i]>a[index])index=i;return index;}void swap(int *x,int *y){int t=*x;*x=*y;*y=t;}void sort(int *a,int n){int i,j;for(i=n;i>0;i--){j=max(a,i);swap(a+i-1,a+j);}}#include<stdio.h>//8-1-4#include<stdlib.h>int main(){int n,i,total,token,*a;printf("Input n:");scanf("%d",&n);if((a=(int*)malloc(n*sizeof(int)))==NULL) exit(1);for(i=0;i<n;i++)a[i]=i+1;total=n;i=0;while(total>1){token=0;/*报数的当前值*/while(token<3){/*未出队的依次报数*/if(a[i]!=0)token++;if(token<3)/*未满m继续报数*/i=(i+1)%n;}a[i]=0;/*报到的出队*/i=(i+1)%n;total--;/*队中人数减*/}for(i=0;i<n;i++)if(a[i]!=0)break;printf("Last No. is: %d\n",a[i]);free(a);return 0;}#include<stdio.h>//8-2-2#include<string.h>int main(){char s[80],m[80];int length,max=0,i;printf("Input 5 strings: ");for(i=0;i<5;i++){scanf("%s",s);length=strlen(s);if(length>max){max=length;strcpy(m,s);}}printf("The longest is: %s\n",m);return 0;}#include<stdio.h>//8-2-3#include<string.h>void delchar(char *s,char c){int i=0;while(*s!='\0'){if(*s==c)/*遇到字符c*/strcpy(s,s+1);/*将该字符后的部分拷贝成从当前位置开始的串*/ s++;}}int main(){char s[80],c;printf("Input a string: ");gets(s);printf("Input a char: ");scanf("%c",&c);delchar(s,c);printf("After deleted, the string is: %s\n",s);return 0;}#include<stdio.h>//8-2-4#include<string.h>void strmcpy(char *s, char *t, int m){strcpy(s,t+m-1);}int main(){char s[80],t[80];int m;。

第二次试验///第三次试验=====================程序============================#include<stdio.h>int main(){/*十进制*/printf("%d\n",3+4*6);printf("%d\n",3*4/6+6);printf("%d\n",2*3/12*8/4);printf("%d\n",10*(1+7*3));printf("%d\n", 20-2/6+3);printf("%d\n", 20-2/(6+3));printf("%d\n", (20-2)/6+3);printf("%d\n", (20-2)/(6+3));/*9－16显示为小数，保留小数2位，宽度为8*/printf("%8.2f\n",3.0+4.0*6.0);printf("%8.2f\n",3.0*4.0/6.0+6.0);printf("%8.2f\n",2.0*3.0/12.0*8.0/4.0);printf("%8.2f\n",10.0*(1.0+7.0*3.0));printf("%8.2f\n",20.0-2.0/6.0+3.0);printf("%8.2f\n",20.0-2.0/(6.0+3.0));printf("%8.2f\n",(20.0-2.0)/6.0+3.0);printf("%8.2f\n",(20.0-2.0)/(6.0+3.0));/*17－20显示为字符*/printf("%c\n", 'm' - 5);printf("%c\n", 'm' + 5);printf("%c\n", 'G' + 6);printf("%c\n", 'G' - 6);/*21－23显示为十进制整数*/printf("%d\n", 'b' - 'a');printf("%d\n", 'g' - 'a' + 1);printf("%d\n", 'g' - 'a' + 1);}=======================运行结果=====================================================================程序========================== #include<stdio.h>int main (){float Cel,Fah;printf("print a Fah number：");scanf("%f",&Fah);Cel=5.0/9.0*(Fah-32);printf("The Cel number is%f\n",Cel);printf("print a Cel number：");scanf("%f",&Cel);Fah=32+9.0*Cel/5.0;printf("The Fah number is:%f \n",Fah);return 0;}============================运行结果=========================************************************（1）程序**********************************#include<stdio.h>int main(){int num1,num2,num3,max,min;printf("please input three numbers:\n");scanf("%d %d %d",&num1,&num2,&num3);max=(num1>num2)?num1:num2;min=(num1<=num2)?num1:num2;max=(num3>max)?num3:max;min=(num3<min)?num3:min;printf("max = %d min = %d",max,min);return 0;}**************************************运行结果***********************************************************************（2）程序********************************* #include <stdio.h>int main(){int a;float profit,income;printf("Please input the profit:");scanf("%f",&profit);a=(profit-1)/100000;switch(a){case 0:income=profit/10;break;case 1:income=(profit-100000)*0.075+10000;break;case 2:case 3:income=(profit-200000)*0.05+10000+7500;break;case 4:case 5:income=(profit-400000)*0.03+10000+7500+10000;break;case 6:case 7:case 8:case 9:income=(profit-600000)*0.01+10000+7500+10000+6000;break;case 10:income=(profit-1000000)*0.01+10000+7500+10000+6000+6000;}printf("奖金数值为：%f\n",income);return 0;}************************************运行结果******************************************************************（3）程序**************************** /*百马百担问题*/#include <stdio.h>int main (){int A,B,C;printf("百马百担的解为：\n");printf("大中小 \n");for (A = 0; A <= 33; A++){for (B = 0; B <= 50; B++){C = 100 - A - B;if (3*A + 2*B + C/2.0 == 100)printf("%-2d %-2d %-2d \n",A,B,C);}}return 0;}********************************运行结果*************************************************************（4）程序****************************************************************（5）程序**********************************//关于菱形的第一种算法//#include <stdio.h>int main(){int i,j,k;printf("请输入最长行的数字，为奇数k：");scanf("%d",&k) ;for (i=1;i<=k;i++){for(j=1;j<=k;j++){if((j+i)>=(k+1)/2+1&&(i+j)<=(k+1)*3/2-1&&i-j<=(k+3)/2-2& &j-i<=(k+3)/2-2)printf(" *");elseprintf(" ");}printf("\n");}return 0;}//第二种算法///#include <stdio.h>int main(){int K,X,C,N;printf("num=");scanf("%d",&N);for(C=1;C<=(N+1)/2;C++){for(K=1;K<=(N+1)/2-C;K++)printf(" ");for(X=1;X<=2*C-1;X++)printf(" *");printf("\n");}for(C=(N+3)/2;C<=N;C++){for(K=1;K<=C-(N+1)/2;K++)printf(" ");for(X=1;X<=2*N+1-2*C;X++)printf(" *");printf("\n");}}************************运行结果***************************************第5/6次试验*********************************（1）程序*********************************** 第7次试验**********************************（1）程序********************************** #include <stdio.h>int main(){int i,j,n;printf("input a number");scanf("%d",&n);int a[n][n];printf("\n");for(i=0;i<n;i++){a[i][0]=1;a[i][i]=1;}for (i=2;i<n;i++)for(j=1;j<i;j++)a[i][j]=a[i-1][j-1]+a[i-1][j];for(i=0;i<n;i++){for(j=0;j<=i;j++)printf("%5d",a[i][j]);printf("\n");}}*********************************************运行结果*********************************************************************（2）程序**************************** 方法一：#include <stdio.h>int main (){int i;int fb[12]={1,1};for(i=2;i<12;i++){fb[i]=fb[i-1]+fb[i-2];printf("第%d个月共有兔子%d只\n",i+1,fb[i]*2);}return 0;}*****************************运行结果*********************************************************************************方法二：#include <stdio.h>int main(){long f1,f2;int i;f1=f2=1;for(i=1;i<=20;i++){printf("%12ld%12ld",f1,f2);if(i%2==0)printf("\n");f1=f1+f2;f2=f1+f2;}return 0;}************************************运行结果******************************************************************（3）程序**************************************** #include<stdio.h>#define num 10int num1(int [],int);int num2(int [],int);int main(){void sort1 (int num1[],int n);void sort2 (int num2[],int n);int a[num], c[num],i,moves,j;printf("enter array here:\n");for(i=0;i<10;i++){j=i;scanf("%d",&a[i]);c[j]=a[i];}printf("the sorted array :\n");sort1(a,num);printf("the sorted array :\n");sort2(c,num);return 0;}void sort1(int num1[],int n){int i,j,temp,b;for(i=0;i<n-1;i++){for(j=1;j<n;j++){if(num1[j]<num1[j-1]){temp=num1[j];num1[j]=num1[j-1];num1[j-1]=temp;}}for(b=0;b<n;b++)printf("%5d",num1[b]);printf("\n");}}void sort2(int num2[],int n){int i,j,min,minidx,temp,b;for(i = 0;i<n-1;i++){min = num2[i];minidx = i;for(j = i+1;j<n;j++){if (num2[j]<min){min = num2[j];minidx = j;}} for(b=0;b<n;b++)printf("%5d",num2[b]);printf("\n");if (min < num2[i]){temp = num2[i];num2[i] = min ;num2[minidx] = temp;}}}******************************运行结果***********************************************************************（4）程序************************************* #include <stdio.h>#define N 10int brnarysearch(int [],int,int);int main(){int nums[N]={1,5,8,9,12,23,45,56,67,99};int item,location;printf("Enter the item you are searching for");scanf("%d",&item);location=brnarysearch(nums,N,item);if(location > -1)printf("The item was found at index location %d\n",location);elseprintf("The item was not found in the list\n");return 0;}#define Ture 1#define False 0int brnarysearch(int list[],int size,int key){int index,found,left,right,midpt;index=-1;found=False;left=0;right=size-1;while ( left <= right && !found){midpt = (int) ((left+right)/2);if (key== list[midpt]){found=Ture;index=midpt;}else if (key > list[midpt])left=midpt + 1;elseright= midpt - 1;}return (index);}**************************************运行结果*********************************第10次试验***********************************程序**************************************** #include<stdio.h>int main(){int a=0,i,k;int b[31];printf("请输入一个十进制数：\n");scanf("%d",&i);while(i!=0){k=i%2;b[a++]=k;i=i/2;}printf("转为二进制数为：\n");while(a>0){printf("%d",b[--a]);}printf("\n");return 0;}***********************************运行结果************************************第9次试验*****************************程序**********************************************#include <stdio.h>#include <stdlib.h>int main(){char name[5][30];int i;int grade[15],num[5];float ave[5];printf("请输入学号、3学科成绩, 姓名,:\n");for(i=0;i<5;i++){scanf("%d",&num[i]);scanf("%d%d%d",&grade[i*3],&grade[i*3+1],&grade[i*3+2]);ave[i]=(grade[i*3]+grade[i*3+1]+grade[i*3+2])/3.0;gets(name[i]);}for(i=0;i<5;i++)printf(" %d %-10s %d %d %d %5.2f\n",num[i],name[i],grade[i*3],grade[i*3+1],gr ade[i*3+2],ave[i]);FILE *outFile;outFile=fopen("C://stud.txt","w");fprintf(outFile," 学号姓名成绩1 成绩2 成绩3 平均成绩\n ");for(i=0;i<5;i++)fprintf(outFile," %d %-10s %5d %5d %5d %5.2f\n",num[i],name[i],grade[i* 3],grade[i*3+1],grade[i*3+2],ave[i]);fclose(outFile);return 0;}***********************************运行结果***********************************第10次试验1. 请使用数组元素存取方式，设计实现一个函数可以将任意字符数组元素存放位置逆转的程序。