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c程序设计实验指导与测试(第四版)所有示例代码

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本科生实验报告实验课程算法语言与程序设计学院名称管理科学学院专业名称信息与计算科学学生姓名学生学号************指导教师王玉兰实验地点数学应用与计算机仿真实验教学示范中心实验成绩二〇一五年三月二〇一五年六月填写说明1、适用于本科生所有的实验报告（印制实验报告册除外）；2、专业填写为专业全称，有专业方向的用小括号标明；3、格式要求：①用A4纸双面打印（封面双面打印）或在A4大小纸上用蓝黑色水笔书写。

②打印排版：正文用宋体小四号，1.5倍行距，页边距采取默认形式（上下2.54cm，左右2.54cm，页眉1.5cm，页脚1.75cm）。

字符间距为默认值（缩放100%，间距：标准）；页码用小五号字底端居中。

③具体要求：题目（二号黑体居中）；摘要（“摘要”二字用小二号黑体居中，隔行书写摘要的文字部分，小4号宋体）；关键词（隔行顶格书写“关键词”三字，提炼3-5个关键词，用分号隔开，小4号黑体)；正文部分采用三级标题；第1章××(小二号黑体居中，段前0.5行)1.1 ×××××小三号黑体×××××（段前、段后0.5行）1.1.1小四号黑体（段前、段后0.5行）参考文献（黑体小二号居中，段前0.5行），参考文献用五号宋体，参照《参考文献著录规则（GB/T 7714－2005）》。

目录目录目录 (3)第一章程序调试 (4)1、修改程序 (4)2、实验项目 (5)3、测试 (5)第二章C语言基础 (6)1、修改程序 (6)2、实验项目 (6)3、测试 (8)第三章控制结构 (9)1、实验项目 (9)2、测试 (13)第四章数组 (15)1、实验项目 (15)2、测试 (20)第五章指针 (23)1、实验项目 (23)2、测试 (27)第六章函数 (29)1、实验项目 (29)2、测试 (36)第七章文件 (39)1、实验项目 (39)2、测试 (43)第八章结构体与共用体 (46)1、实验项目 (46)2、测试 (47)教师评阅 (53)第一章程序调试1、修改程序【实验1-1】源代码：#include <stdio.h>int main(void){int a, b, sum;a=40; b=50;sum=a+b;printf("Hello, C! \n");printf("Sum is %d \n", sum);return(0);}运行结果：【实验1-2】源代码：#include <stdio.h>int main(void){float aver;int n1=90,n2=85,n3=88,n4=79,n5=95;aver=(n1+n2+n3+n4+n5)/5;printf ("5aver = %0.2f \n", aver);return(0);}运行结果：2、实验项目无3、测试【ts1-1】源代码：#include <stdio.h>int main(void){int x, y, z;x=5, y=8;z=x+y;printf ("x=%d,y=%d,z=%d\n",x,y,z); return(0);}运行结果：【ts1-2】源代码：#include <stdio.h>int main(void){int a=2, b=3;float x=8.2, y=9.2, z;z=x/2 + y/b;printf ("z=%0.2f\n", z);return(0);}运行结果：第二章C语言基础1、修改程序【实验2-1】源代码：#include <stdio.h>int main(void){int x, y, sum;printf("input X:");scanf("%d",&x);printf("input Y:");scanf("%d",&y);sum=x+y;printf ("sum=%d\n", sum);return(0);}运行结果：2、实验项目【实验2-2】源代码：#include<stdio.h>void main(){int s1,s2,s3,s4,s5;float a;printf("请输入五门课的成绩：");scanf("%d%d%d%d%d",&s1,&s2,&s3,&s4,&s5);a=(s1+s2+s3+s4+s5)/5.0;printf("平均分:%0.2f \n",a);}运行结果：【实验2-3】源代码：#include<stdio.h>void main(){printf("-----------------------------\n");printf("1. Enter data\n");printf("2. Data processing\n");printf("3. End\n");printf("-----------------------------\n");}运行结果：【实验2-4】源代码：#include<stdio.h>int main(void){int a,b,c,d,e,w=1,x=2,y=3,z=4;a=b=c=1;d=++a||++b&&++c;e=w>x&&y>z;printf("a=%d,b=%d,c=%d,d=%d,e=%d\n",a,b,c,d,e); return(0);}运行结果：3、测试【2-1】源代码：#include<stdio.h>int main(void){char c1,c2;printf("\nEnter a character:");scanf("%c",&c1);c1=c1-32;c2=c1+1;printf("\nResult is\n %c %c", c1,c2); printf("\n%4d%4d",c1,c2);return(0);}运行结果：【2-2】源代码：#include <stdio.h>int main(void){double t=1.0;t+=1/2.0+1/3.0+1/4.0+1/5.0;printf("\nThe result is %f\n",t);return(0);}运行结果：第三章控制结构1、实验项目【实验3-1】源代码:#include<stdio.h>int main (){ int a;printf("----------------------------");printf(" \n 1. Enter data \n 2. Data processing \n 3. End \n");printf("----------------------------\n");printf(" selet your number: \n");scanf("%d",&a);switch(a){case 1: printf("Enter data \n");break;case 2: printf("Data processing \n");break;case 3: printf("End \n");break;default : printf("error!");}}运行结果:【实验3-2】源代码：#include<stdio.h>int main (){int i=0,a[5],b=0; float c;printf("输入五个分数：");for(i=0;i<5;i++){ scanf("%d",&a[i]); }for(i=0;i<5;i++){ b+=a[i]; }c=b/5.0;printf("平均分：%3.2f\n 大于平均成绩的：",c);for(i=0;i<5;i++){if(a[i]>c) printf("%3d ",a[i]);}}运行结果：【实验3-3】源代码：#include<stdio.h>int main (){int a,g,s,b;for(b=1;b<=9;b++){for(s=0;s<=9;s++){for(g=0;g<=9;g++){a=g*g*g+s*s*s+b*b*b;if(a==b*100+s*10+g) printf("%d\t",a);}}}printf("\n");}运行结果：【实验3-4】源代码：#include<stdio.h>int main (){int a, i,j;printf("*\t");for(a=1;a<=9;a++) {printf("%d\t",a);}printf("---------------------------------------------------------------------------\n");for(i=1;i<=9;i++){printf("%d\t",i);for(j=1;j<=i;j++){printf("%d\t",j*i);}printf("\n");}}运行结果：【实验3-5】源代码：#include<stdio.h>int main (){char ch;int ch_num=0,dig_num=0,oth_num=0;do {scanf("%c",&ch);if(ch<='z'&&ch>='a') ch_num+=1;else if (ch<='Z'&&ch>='A') ch_num+=1;else if (ch<='9'&&ch>='0') dig_num+=1;else oth_num++ ;} while (ch!='\n');printf("字母：%d\n 数字：%d\n其他：%d\n",ch_num,dig_num,oth_num-1);return(0);}运行结果：【实验3-6】源代码：#include<stdio.h>#include<math.h>void main(){float x1,x2,x0,f0,f1,f2;printf("输入X1 X2\n");scanf("%f%f",&x1,&x2);while(1){f1=2*x1*x1*x1-4*x1*x1+3*x1-6;f2=2*x2*x2*x2-4*x2*x2+3*x2-6;x0=(x1+x2)/2;f0=2*x0*x0*x0-4*x0*x0+3*x0-6;if(f0*f1<0)x2=x0;elsex1=x0;if(fabs(f0)<=1e-5)break;}printf("结果%f\n",x0);}运行结果：【实验3-7】源代码：#include<stdio.h>void main(){int i,j,k,n,m;scanf("%d",&n);m=0;for(i=1;i<n+1;i++){for(j=0;j<n-i;j++) printf(" ");for(k=1;k<=(2*i-1);k++){if(k<=i)printf(" %d",k);else{m++;printf(" %d",k-2*m);}}m=0;printf("\n");}}运行结果：2、测试【填空3-1】源代码：#include <stdio.h>#include <conio.h>int main(void){int num=0,g,s,b;printf("\nInput data :");scanf("%d",&num);printf("\nThe result is: ");g=num%10;s=num/10%10;b=num/100;if((g+b)==s)printf("YES\n");elseprintf("NO\n");return(0);}运行结果：【改错题3-2】源代码：#include<stdio.h>int main(void){int k,m=0,mc=0, j;printf("\nEnter data: ");scanf("%d",&k);while((k>=2)&&(mc<6)) {if((k%7==0)||(k%11==0)){m+=k;mc++;}k--;}printf("\nresult is %d\n",m); return(0);}运行结果：【编程题3-3】源代码：#include<math.h>#include<stdio.h>main(){int n=1,count=0;float x;double sum ,term;printf("input x:");scanf("%f",&x);sum=x;term=x;do{term=-term*x*x/((n+1)*(n+2));sum=sum+term;n=n+2;count++;}while (fabs(term)>=1e-5);printf("sin(x)=%f,count=%d\n",sum,count);}运行结果：第四章数组1、实验项目【实验4-1】源代码：#include<stdio.h>int main(){int a[50],i=2,b;a[0]=1;a[1]=1;for(i=2;i<16;i++){a[i]=a[i-1]+a[i-2];}for(b=0;b<16;b++){printf("%6d",a[b]);if((b+1)%4==0) printf("\n");}}运行结果：【实验4-2】源代码：#include<stdio.h>int main(){int a[10] ,i,b=0;printf("输入五门课程成绩:\n");for(i=0;i<5;i++) scanf("%d",&a[i]); //输入无门课程成绩for(i=0;i<5;i++) b+=a[i]; //计算总分b=b/5; //计算平均数for(i=0;i<5;i++) //找出分数高于平均数的{if(a[i]>b) printf("序号:%d 成绩: %d\n",i,a[i]);}}运行结果：【实验4-3】源代码：#include<stdio.h>int main(){int a[3][5],i,j;float b[3]={0,0,0};for(i=0;i<3;i++){ printf("输入第%d名学生的五门成绩：\n",i+1);for(j=0;j<5;j++){scanf("%d",&a[i][j]);}}for(i=0;i<3;i++) //计算平均分{for(j=0;j<5;j++){b[i]=b[i]+a[i][j];}}for(i=0;i<3;i++) b[i]/=5.0;for(i=0;i<3;i++) printf("第%d位同学的平均分%2.2f\n",i+1,b[i]);}运行结果：【实验4-4】源代码：#include<stdio.h>#include<string.h>int main(){char classes[6][15]={"Wang Wu","Zhang San","Li Si","Zhao Liu","Ding Yi","Qian er"};char name[15];int i,b;printf("输入名字:");gets(name);for(i=0;i<6;i++){if(strcmp(name,classes[i])==0){printf("%s是\n",name); b=1; break;}b=0;}if(b==0)printf("%s不是\n",name);}运行结果：【实验4-5】源代码：#include<stdio.h>void main(){char a[12]="abcdefklmnp",ch;int top,bot,mid;printf("Input a character :");scanf("%c",&ch);bot=0;top=10;for(;bot<top;){mid=(bot+top)/2;if(a[mid]==ch){printf("This charcreat in a\nSubscript%d\n",mid+1);break;}else if(ch>a[mid]) bot=mid+1;else top=mid-1;}if(bot>top)printf("This character not in a ");}运行结果：【实验4-6】源代码：#include<stdio.h>#define N 30void main(){int i=0;long n;char str[N];printf("Inputs a posivite integer:");scanf("%ld",&n);while(n>0){str[i]=n%10+'0';n=n/10;i++;}str[i]='\0';printf("%s\n",str);}运行结果：2、测试【填空题4-1】源代码：#include<stdio.h>#include<stdlib.h>#define N 20int main(void){int a[N][N];int n,i,j,k;double s=0,aver=0;printf("\nInput the dimension of array N: ");scanf("%d",&n);printf("***** The array *****\n");for(i=0;i<n;i++){for(j=0;j<n;j++){a[i][j]=rand()%10;printf("%4d",a[i][j]);if(i==0||j==0||i==n-1||j==n-1)s+=a[i][j];}printf("\n");}k=4*(n-1);aver =s/k;printf("***** THE RESULT *****\n");printf("The average is %2.3f\n",aver);return(0);}运行结果：【改错题4-2】源代码：#include <stdio.h>int main(void){int i, j;char s[80];printf("\nEnter a string: "); gets(s);printf("The original string: "); puts(s);for(i=j=0; s[i]!='\0';i++)if(s[i]!='S'){s[j]=s[i];j++;}s[j]='\0';printf("The string after deleted: "); puts(s);return(0);}运行结果：【编程题4-3】源代码：#include<stdio.h>void main(){int i=0,j;char str[100];int num[27]={0};printf("input str:");gets(str);while(str[i]!='\0'){j=str[i]-'a';num[j]=num[j]+1;i++;}for(j=0;j<26;j++) printf("%d ",num[j]);}运行结果：【完善程序4-4】源代码：#include<stdio.h>#include<math.h>#define N 10int main(void){int i;double x[N]={92.0,85.0,56.0,75.0,82.0,79.0,65.0,91.0,89.0,56.0};double x1=0.0,s=0.0;for(i=0;i<10;i++)x1+=x[i];x1/=10;for(i=0;i<10;i++)s+=pow((x[i]-x1),2);s/=10;s=sqrt(s);printf("%f\n",s);return(0);}运行程序：第五章指针1、实验项目【实验5-1】源代码：#include<stdio.h>#define N 10int main(void){int x[N],*p1,*p2,i;for(i=0;i<N;i++)scanf("%d",x+i);for(p1=x,p2=x;p1-x<N;p1++)if(*p1>*p2) p2=p1;printf("MAX=%d,INDEX=%d\n",*p2,p2-x);return(0);}运行结果：【实验5-2】源代码：#include<stdio.h>#define M 20int main(void){int i,x[M],n, m, *p,*k,*j;printf("\nEnter n:");scanf("%d",&n);printf("\nEnter array x[i](i=0~%d):",n-1);for(i=0;i<n;i++)scanf("%d",x+i);printf("\n");m=n/2;k=x;j=x+n-1;p=x+m;for(;k<=p;k++,j--){int t=*k;*k=*j;*j=t;}printf("\nThe array inverted:\n"); for(i=0;i<n;i++)printf("%d ",x[i]);return(0);}运行结果：【实验5-3】源代码：#include<stdio.h>#include<ctype.h>int main(void){char ch[80],*c;int d,k=0;printf("\nPlease input a string:");gets(ch);c=ch;for(;*c;c++)if(k){if(*c==' '){k=0;*(c-1)=toupper(*(c-1));}}elsek=1;printf("\nResult is: %s\n",ch);return(0);}运行结果：【实验5-4】源代码：#include<stdio.h>#define N 80int main(void){int i=0,j=0,n;char str[N],*p=str;printf("\nEnter a string:");scanf("%s",str);while(*(p+i)){if(*(p+i)<='Z'&&*(p+i)>='A'){str[j]=*(p+i);j++;}i++;}str[j]='\0';printf("%s \n",str);return(0);}运行结果：【实验5-5】源代码：#include<stdio.h>#include<stdlib.h>int main(){int *p,n;int i,j;float ave=0;printf("输入学生数n:");scanf("%d",&n);p=(int *)malloc(n*5*sizeof(int));if(p==NULL){printf("ERROR");exit(0);}for(i=0;i<n;i++){ printf("输入第%d名学生的五门成绩：\n",i+1);for(j=0;j<5;j++)scanf("%d",p+5*i+j);}for(i=0;i<n;i++) //计算平均分{for(j=0;j<5;j++)ave+=*(p+i*5+j);printf("第%d位同学的平均分%2.2f\n",i+1,ave/5);ave=0;}}运行结果：【实验5-6】源代码：#include<stdio.h>int main(void){int base=0;char str[80], *p=str;printf("Input the binary number\n");gets(str);while(*p!='\0'){base=base*2+*p-48;p++;}printf("%d\n", base);return(0);}运行结果：2、测试【填空题5-1】源代码：#include<string.h>#include<stdio.h>int main(void){char str[50],*p1,*p2;int i, t=0;printf("Input:");scanf("%s",str);p1=str;p2=str+strlen(str)-1;for (i=0;i<=(strlen(str)-1)/2;i++)if (*p1!=*p2){t=1;break;}if(t!=1)printf("%s\n","yes!");elseprintf("%s\n","no!");return(0);}运行结果：【改错题5-2】源代码：运行结果：【填空题5-3】源代码：#include <stdio.h>#include <string.h>int main(void){char *p,str[100];long int n=0;int flag=1;p=str;printf("Enter a string:\n");gets(p);while(*p!='\0'){if(*p=='-')flag=-1;p++;}n=n*10+*p-48;p++;}printf("%ld\n",n*flag);return(0);}运行结果：第六章函数1、实验项目【实验6-1】源代码：#include<stdio.h>float aver (float b[],int n );int main(void){float ave,a[10];int i;for (i=0;i<10;i++)scanf ("%f",&a[i]);ave =aver(a,10) ;printf ("average =%6.2f\n", ave);return(0);}float aver (float b[],int n ){int i ;float max,min,sum ;max=min=sum=b[0] ;for (i=1;i<n;i++)if (b[i]>max )max=b[i] ;else if ( b[i]<min )min=b[i] ;sum=sum+b[i] ;}printf ("max=%6.2f\n min=%6.2f\n",max,min);return (sum/n) ;}运行结果：【实验6-2】源代码：#include <stdio.h>int main(void){int a,b,x;int gcd(int,int);printf("Enter a,b: ");scanf("%d%d",&a,&b);x=gcd(a,b);printf("%d",x);return(0);}int gcd(int u,int v){int t;while(u%v!=0){t=u%v;u=v;v=t;}return(v);}运行结果：【实验6-3】源代码：#include <stdio.h>int main(void){int a,b,x;int gcd(int,int);printf("Enter a,b: ");scanf("%d%d",&a,&b);x=gcd(a,b);printf("%d",x);return(0);}int gcd(int u,int v){if(u%v==0)return v;elsereturn (gcd(v,u%v)); }运行结果：【实验6-4】源代码：#include <stdio.h>#include<stdlib.h>int main(int argc,char *argv[]) {int a,b,x;int gcd(int,int);a=atoi(argv[1]);b=atoi(argv[2]);printf("a=%d b=%d\n",a,b); x=gcd(a,b);printf("gcd=%d",x);return(0);}int gcd(int u,int v){int t;while(u%v!=0){t=u%v;u=v;v=t;}return(v);}运行结果：【实验6-5】源代码：#include <stdio.h>#include<stdlib.h>void invert(int a[],int n){int i,w,nn=n/2;for(i=0;i<nn;i++){ w=a[i-n];a[i-n]=a[-i-1];a[-i-1]=w;} }int main(void){int i,n,*a;while(1){printf("Enter n:");scanf("%d",&n);printf("\n");if(n>0)break;}a=(int *)malloc(n*sizeof(int));if(a==NULL){printf("allocation error_aborting");exit(1);}printf("Enter a[0]...a[%d]:",n);for(i=0; i<n; i++)scanf("%d",a++);invert(a,n);printf ("the array has been invert:\n");for(i=0;i<n;i++){if(i%5==0)printf("\n");printf("%5d",*(a-n+i));}return(0);}运行结果：【实验6-6】源代码：#include<stdio.h>#include<stdlib.h>float aver(int n,int m ,int *p);int main(){int *p,n,i,j,m;printf("输入学生数n:");scanf("%d",&n);printf("输入科目数m:");scanf("%d",&m);p=(int *)malloc(n*m*sizeof(int));if(p==NULL){printf("ERROR");exit(0);}for(i=0;i<n;i++){ printf("输入第%d名学生的%d门成绩：\n",i+1,m);for(j=0;j<m;j++)scanf("%d",p+m*i+j);}aver(n,m,p);}float aver(int n,int m ,int *p){float ave=0;int i,j;for(i=0;i<n;i++) //计算平均分{for(j=0;j<m;j++)ave+=*(p+i*m+j);printf("第%d位同学的平均分%2.2f\n",i+1,ave/m);ave=0;}}运行结果：【实验6-7】源代码：#include<stdio.h>#define N 10int score[N]={11,22,33,44,55,96,87,78,69,10};int *Getmax();int main(void){int *p;p=Getmax();printf("Max value in array is %d\n",*p);return(0);int *Getmax(){int t,i,position=0;t=score[0];i=0;while(i<N){if(score[i]>t){t=score[i];position=i;}i++;}return(&score[position]);}运行结果：【*实验6-8】源代码：#include<stdio.h>#include<stdlib.h>int fun(int n,int *p,int num);void main(){int i,n,*p,num,rut;printf("数字的个数n:");scanf("%d",&n);p=(int*)malloc(n*sizeof(int));if(p==NULL) exit(0);printf("数字：");for(i=0;i<n;i++)scanf("%d",p+i);printf("输入要查找的数num:");scanf("%d",&num);rut=fun(n,p,num);printf("地址:%p 数值:%d\n",p+rut,*(p+rut)); }int fun(int n,int *p,int num)int i,flag,*a;a=p;for(i=0;i<n;i++){if(*(a+i)==num)flag=i;}return(flag);}运行结果：2、测试【填空题6-1】源代码：#include<stdio.h>#define N 20int bb[N];int fun(char *p,char t) {int i=0, n=0;while(*p){if (*p==t)bb[n++]=i;p++;i++;}return (n);}int main(void){char str[N];char ch;int i, j,n;printf("\nInput the original string: ");gets(str);printf("\nInput character :");scanf("%c",&ch);n=fun(str,ch);printf("\nThe numbr of character is:%d\n",n);printf("\nThe suffix of character:");for(i=0;i<n;i++)printf("%d ",bb[i]);return(0);}运行结果：【调试6-2】源代码：#include<stdio.h>#include <conio.h>#include <string.h>char *fun(char *s,char *t){char *p,*r,*a=NULL;while(*s){ p=s;r=t;while(*r){if(*r==*p) {r++;p++;}else break;if(*r=='\0')a=s;}s++;}return a;}int main(void){char s[100],t[100],*p;printf("\nPlease enter string S: ");scanf("%s",s);printf("\nPlease enter substring t: ");scanf("%s",t);p=fun(s,t);if(p!=0) printf("\nThe result is:%s\n ",p);else printf("\nNot found!\n ");return(0);}运行结果：【完善程序6-3】源代码：#include <stdio.h>float fun (int m, int n){float m1,m2,m3;int i;m1=1;m2=1;m3=1;for(i=1;i<=m;i++)m1*=i;for(i=1;i<=n;i++)m2*=i;for(i=1;i<=(m-n);i++)m3*=i;return(m1/(m2*m3));}int main (void){int m,n;printf("\nEnter m,n: ");scanf("%d,%d",&m,&n);printf ("p=%f\n",fun(m,n) ) ;return(0);}运行结果：第七章文件1、实验项目【实验7-1】源代码：#include<stdio.h>#include<stdlib.h>int main (){int a, i,j;FILE *p;p=fopen("S7-1.out","w");if(p==NULL){printf("file can not open!");exit(0);}printf("*\t");fprintf(p,"*\t");for(a=1;a<=9;a++){printf("%d\t",a);fprintf(p,"%d\t",a);}printf("---------------------------------------------------------------------------\n");fprintf(p,"------------------------------------------------------------------------------\n");for(i=1;i<=9;i++){printf("%d\t",i);fprintf(p,"%d\t",i);for(j=1;j<=i;j++){printf("%d\t",j*i);fprintf(p,"%d\t",j*i);}printf("\n");fprintf(p,"\n");}fclose(p);}运行结果：【实验7-2】源代码：#include<stdio.h>#include<stdlib.h>#include<string.h>int main(void){FILE *fp;char str[100],filename[10];int i=0;if((fp=fopen("S7-2.out","w"))==NULL) {printf("Open file error\n");exit(0);}printf("please enter a string:\n");gets(str);while(str[i]!='!'){if(str[i]>='a'&&str[i]<='z')str[i]=(str[i]-32);fputc(str[i],fp);i++;}fclose(fp);printf("\n");fp=fopen("S7-2.out","r");fgets(str,strlen(str)+1,fp);printf("%s\n",str);fclose(fp);return(0);}运行结果：【实验7-2】源代码：#include<stdio.h>#include<stdlib.h>float aver(int n,int m ,int *p);int main(){FILE *fp;int *p,n,i,j,m;fp=fopen("S7-2.dat","w");if(fp==NULL){printf("file can not open");exit(0);}printf("输入学生数n:");scanf("%d",&n);printf("输入科目数m:");scanf("%d",&m);p=(int *)malloc(n*m*sizeof(int));if(p==NULL){printf("ERROR");exit(0);}for(i=0;i<n;i++){ printf("输入第%d名学生的%d门成绩：\n",i+1,m);for(j=0;j<m;j++){scanf("%d",p+m*i+j);fprintf(fp,"%d ",*(p+m*i+j));}}fclose(fp);fp=fopen("S7-2.dat","r");if(fp==NULL){printf("file can not open");exit(0);}aver(n,m,fp);}float aver(int n,int m ,FILE *p){float ave=0;int i=0,j,a[20];while(!feof(p)){fscanf(p,"%d",&a[i]);i++;}for(i=0;i<n;i++) //计算平均分{for(j=0;j<m;j++)ave+=a[i*m+j];printf("第%d位同学的平均分%2.2f\n",i+1,ave/m);ave=0;}return 0;}运行结果：2、测试【改错7-1】源代码：#include <stdio.h>int main(void){FILE *in,*out;int i,j,a[3][3],b[3][3];in=fopen("CS7-1.dat","r");for(i=0; i<3; i++)for(j=0; j<3; j++)fscanf(in,"%d",&a[i][j]);rewind(in);for(i=0; i<3; i++)for(j=0; j<3; j++)fscanf(in,"%d",&b[i][j]);fun(a,b);out=fopen("CS7-1.out","w");for(i=0; i<3; i++){for(j=0; j<3; j++){printf ("%4d ", a[i][j]);fprintf (out,"%4d ", a[i][j]);}printf("\n");fprintf(out,"\n");}fclose(in);fclose(out);return(0);}fun(int a[3][3],int b[3][3]){int i,j;for(i=0;i<3;i++)for(j=0;j<3;j++)a[i][j]+=b[i][j];}运行结果：【完善程序7-2】源代码：#include <conio.h>#include <stdio.h>int main (void){FILE *fp;int x,a[100], n, i ;void fun ();printf("\nPlease enter an integer number : \n ") ; scanf ("%d", &x) ;fun (x, a, &n) ;printf ("\nResult is : ") ;fp=fopen("CS7-2.out","w");if(fp==NULL){printf("file cam mot open");exit(0);}for(i=0;i<n;i++){printf("%d ",a[i]);fprintf(fp,"%d ",a[i]);}return(0);}void fun (int x, int p[], int *n){int i,j=0;for(i=1;i<=x;i++){if(x%i==0)if(i%2==0){p[j]=i;j++;}}*n=j;}运行结果：第八章结构体与共用体1、实验项目【实验8-1】源代码：#include <stdio.h>#include <string.h>#define NUM 4struct student{int rank;char * name;float score;};struct student stu [ ]= { 3, "Tom", 89.5,4, "Mary", 76.5,1, "Jack",98.0,2, "Jim" ,92.0 };int main(void){char str[10];int i;do {printf ("Enter a name: ");gets(str);for(i=0;i<NUM;i++){if(strcmp(stu[i].name,str)==0)printf("%d %s %f\n",stu[i].rank,stu[i].name,stu[i].score);}}while(strcmp(str,"0" )!=0);return(0);}运行结果：【实验8-2】源代码：运行结果：2、测试【填空8-1】源代码：#include <stdio.h>#define N 8typedef struct{char num[10];double s[N];double ave;} STREC;int main(void){STREC s={ "GA005 ",85.5,76,69.5,85,91,72,64.5,87.5};int i;void fun();fun(&s);printf("The %s's student data:\n", s.num); /*输出学号*/for(i=0;i<N;i++)printf("%4.1f\n",s.s[i]); /*输出各科成绩*/ printf("\nave=%7.3f\n", s.ave); /*输出平均分*/ return(0);}void fun(STREC *p){int i;p->ave=0.0;for(i=0;i<N;i++)p->ave=p->ave+p->s[i]; /*求各门成绩的总和*/ p->ave/=i;; /*求平均分*/}运行结果：【改错8-2】源代码：#include <string.h>#include <stdio.h>#include <stdlib.h>#define N 10typedef struct ss{char num[10];int s;} STU;STU *fun(STU a[], int m){STU b[N],*t;int i, j,k;/*******************found*****************/t=(STU *)malloc(m*sizeof(STU));for(i=0;i<N;i++)b[i]=a[i];for(k=0;k<m;k++){/*******************found*****************/for (i=j=0;i<N;i++)if(b[i].s<b[j].s)j=i;/*******************found*****************/t[k]=b[j];b[j].s=100;}return t;}outresult(STU a[],FILE *pf){int i;for(i=0;i<N;i++)fprintf(pf, "No=%s Mark=%d\n ",a[i].num, a[i].s);fprintf(pf, "\n\n ");}int main(void){STU a[N]={{"A01 ",77},{"A02 ",85},{"A03 ",96},{"A04 ",65},{"A05 ",75}, {"A06 ",96},{"A07 ",76},{"A08 ",63},{"A09 ",69},{"A10 ",78}};STU *pOrder;int i, m;printf("*****THE RESULT*****\n");outresult(a,stdout);printf("\nGive the number of the students who have lower score: ");scanf("%d",&m);while(m>10){printf("\nGive the number of the students who have lower score: ");scanf("%d",&m);}pOrder=fun(a,m);printf("\nThe Result is :");printf("\nThe low : \n");for(i=0;i<m;i++)printf("%s %d\n",pOrder[i].num, pOrder[i].s);free(pOrder);return(0);}。

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C程序设计第四版实验报告材料实验1C程序地运行环境和运行C程序地方法

C程序设计第四版实验报告材料实验1C程序地运行环境和运行C程序地方法

C程序设计第四版实验报告材料实验1C程序地运行环境和运行C程序地方法实用标准文案1.输入下面的程序：#includeint main{printf(This is a c program.\n);return 0;}编译连接无错误，检查得知输出结果无错误。

2.输入错误程序：#includeint main{int a,b,suma=123;b=456;sum=a+bprint (sum is d\n,sum);return 0;}错误提醒：12.cppe:\visual c\12.cpp(4) : error C2146: synta error : missing #;;#; before identifier #;a#;e:\visual c\12.cpp(6) : error C2146: synta error : missing #;;#; before identifier #;print#;e:\visual c\12.cpp(6) : error C2065: #;print#; : undeclared identifier执行 cl.ee 时出错.精彩文档．实用标准文案12.ee - 1 error(s), 0 warning(s)输入正确程序#includeint main{int a,b,sum;a=123;b=456;sum=a+b;printf(sum is d\n,sum);return 0;}输出结果3.输入下面的程序：#includeint main{int ma(int ,int y);int a,b,c;printf(input ab:);scanf(d,d,a,b);c=ma(a,b);printf(ma=d\\n,c);精彩文档．实用标准文案return 0;}int ma(int ,int y);{int z;if(>y) z=;else z=y;return(z);}输出结果将第ma函数中的第3,4两行合并写为一行#includeint main{int ma(int ,int y);int a,b,c;printf(input ab:);scanf(d,d,a,b);c=ma(a,b);printf(ma=d\\n,c);return 0;}int ma(int ,int y){int z;精彩文档．实用标准文案if(>y) z=;else z=y;return (z);}运行结果实验二1.输入如下程序：#includeint main{char c1,c2;c1=97;c2=98;printf(c,c\nc1,c2);printf(d,d\n,c1,c2);return 0;} 运行错误，因为c1前面没有字符将它隔开如果将程序第4,5行改成c1=197;c2=198;输出结果如果将程序第3行改成int c1,c2;精彩文档．实用标准文案)为整形数据（因为int运行时会输出函数输入数据：2.用下面的scanf#includeint main{int a,b;float ,y;char c1,c2;scanf(a=?=d,a,b);scanf(fe,,y);scanf(cc,c1,c2);printf (a=d,b=d,=5.1f,y=5.2f,c1=c,c2=c,a,b,,y,c1,c2);return 0;}a=3,b=7,=8.5,y=71.82,A,a输入a=3 b=7 =8.5 y=71.82 A a输入a=3 b=7 8.5 71.82 A a输入a=3 b=7 8.5 71.82Aa输入精彩文档．实用标准文案3 7 8.5 71.82Aa输入a=3 b=7输入8.5 71.82Aaa=3 b=7 输入8.5 71.82 Aaa=3 b=7 输入8.5 71.82Aa 3.输入以下程序：#includeint main{精彩文档．实用标准文案int i,j,m,n;i=8;j=10;m=++i;n=j++;printf(d,d,d,d\n,i,j,m,n); return 0;}输出结果：行改成，将第67m=i++;n=++j;输出结果：精彩文档．。

C语言实验指导书的程序编码

C语言实验指导书的程序编码

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++)<>。

C语言程序设计实验及代码

C语言程序设计实验及代码

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。

C++程序设计实验指导书(第四版)

C++程序设计实验指导书(第四版)

目录实验一熟悉Visual C++开发环境及上机过程错误!未定义书签。

实验二类的定义和对象的使用............. 错误!未定义书签。

实验三多文件结构及静态成员和对象数组的使用错误!未定义书签。

实验四类的继承和派生................... 错误!未定义书签。

实验五多继承 .......................... 错误!未定义书签。

实验六虚函数的使用..................... 错误!未定义书签。

实验七抽象类的使用..................... 错误!未定义书签。

实验八运算符重载和友元................. 错误!未定义书签。

实验九 STL的使用....................... 错误!未定义书签。

实验十 STL的使用....................... 错误!未定义书签。

实验十一利用AppWizard向导生成Windows应用程序错误!未定义书签。

C++实验上机指导实验一熟悉Visual C++开发环境及上机过程一、实验目的1、了解和使用VC集成开发环境；2、熟悉VC环境的基本命令和功能键；3、熟悉常用的功能菜单命令；4、学习使用VC++环境的帮助；5、学习完整的C++程序开发过程；6、理解简单的C++程序结构。

二、实验内容使用Visual C++ 6.0集成环境来编辑、编译并运行程序1：#include <iostream>using namespace std;class TAdd{public:TAdd(int a,int b){x=a;y=b;cout<<"constructor."<<endl;cout<<x<<","<<y<<endl;}~TAdd(){cout<<"destructor."<<endl;cout<<x<<","<<y<<endl;}int add(){return x+y;}private:int x,y;};int main(){TAdd p1(3,4);cout<<"x+y="<<p1.add()<<endl;TAdd p2(30,40);cout<<"x+y="<<p2.add()<<endl;return 0;}三、实验步骤启动Visual C++ 6.0——选择菜单“开始/程序/Microsoft Visual Studio6.0/Microsoft Visual C++ 6.0”,启动后的用户界面如图1-1所示。