C语言编写四则运算

#include"stdio.h"#include"stdlib.h"void main(){int a,b,c,d,e,f,g,t;printf("****************************欢迎使用！************************\n");printf("\n");printf("1.加法运算\n");printf("2.减法运算\n");printf("3.乘法运算\n");printf("4.除法运算\n");printf("*****************************请选择运算类型:");scanf("%d",&a);while(a<1||a>4){printf("输入错误,请重新输入");scanf("%d",&a);}if(a==1){printf("5,一位数加一位数\n");printf("6,一位数加两位数\n");printf("7,两位数加两位数\n");printf("*********************************请输入题型:");scanf("%d",&a);while(a<5||a>7){printf("输入错误,请重新输入");scanf("%d",&a);}if(a==5){loop:b=rand()%10;c=rand()%10;d=b+c;printf("%d+%d=?\n",b,c);printf("请输入答案：");scanf("%d",&e);while(e!=d){printf("回答错误，请重做");printf("%d+%d=?\n",b,c);printf("请输入答案：");scanf("%d",&e);}printf("回答正确!是否做下一题？\n");printf("输入0表示是，输入1表示否\n");scanf("%d",&f);if(f==0)goto loop;if(f==1)printf("欢迎再次使用！");}if(a==6){loo: b=rand()%10;c=rand()%100;if (c<10) c=c+10;d=b+c;printf("%d+%d=?\n",b,c);printf("请输入答案：");scanf("%d",&e);while(e!=d){printf("回答错误，请重做");printf("%d+%d=?\n",b,c);printf("请输入答案：");scanf("%d",&e);}printf("回答正确!是否做下一题？\n");printf("输入0表示是，输入1表示否\n");scanf("%d",&f);if(f==0)goto loo;if(f==1)printf("欢迎再次使用！");}if(a==7){loog:b=rand()%100;c=rand()%100;if(c<10) c=c+10;if(b<10) b=b+10;d=b+c;printf("%d+%d=?\n",b,c);printf("请输入答案：");scanf("%d",&e);while(e!=d){printf("回答错误，请重做");printf("%d+%d=?\n",b,c);printf("请输入答案：");scanf("%d",&e);}printf("回答正确!是否做下一题？\n");printf("输入0表示是，输入1表示否\n");scanf("%d",&f);if(f==0)goto loog;if(f==1)printf("欢迎再次使用！");}}if(a==2){printf("5,一位数减一位数\n");printf("6,两位数减一位数\n");printf("7,两位数减两位数\n");printf("请输入题型:");scanf("%d",&a);while(a<5||a>7){printf("输入错误,请重新输入");scanf("%d",&a);}if(a==5){car: b=rand()%10;c=rand()%10;d=b-c;printf("%d-%d=?\n",b,c);printf("请输入答案：");scanf("%d",&e);while(e!=d){printf("回答错误，请重做");printf("%d-%d=?\n",b,c);printf("请输入答案：");scanf("%d",&e);}printf("回答正确!是否做下一题？\n");printf("输入0表示是，输入1表示否\n");scanf("%d",&f);if(f==0)goto car;if(f==1)printf("欢迎再次使用！");}if(a==6){truck:b=rand()%100;if(b<10) b=b+10;c=rand()%10;d=b-c;printf("%d-%d=?\n",b,c);printf("请输入答案：");scanf("%d",&e);while(e!=d){printf("回答错误，请重做");printf("%d-%d=?\n",b,c);printf("请输入答案：");scanf("%d",&e);}printf("回答正确!是否做下一题？\n");printf("输入0表示是，输入1表示否\n");scanf("%d",&f);if(f==0)goto truck;if(f==1)printf("欢迎再次使用！");}if(a==7){boat:b=rand()%100;if(b<10) b=b+10;c=rand()%100;if(c<10) c=c+10;d=b-c;printf("%d-%d=?\n",b,c);printf("请输入答案：");scanf("%d",&e);while(e!=d){printf("回答错误，请重做");printf("%d-%d=?\n",b,c);printf("请输入答案：");scanf("%d",&e);}printf("回答正确!是否做下一题？\n");printf("输入0表示是，输入1表示否\n");scanf("%d",&f);if(f==0)goto boat;if(f==1)printf("欢迎再次使用！");}}if(a==3){printf("5,一位数乘一位数\n");printf("6,一位数乘两位数\n");printf("7,两位数乘两位数\n");printf("请输入题型:");scanf("%d",&a);while(a<5||a>7){printf("输入错误,请重新输入");scanf("%d",&a);}if(a==5){life:b=rand()%10;c=rand()%10;d=b*c;printf("%d*%d=?\n",b,c);printf("请输入答案：");scanf("%d",&e);while(e!=d){printf("回答错误，请重做");printf("%d*%d=?\n",b,c);printf("请输入答案：");scanf("%d",&e);}printf("回答正确!是否做下一题？\n");printf("输入0表示是，输入1表示否\n");scanf("%d",&f);if(f==0)goto life;if(f==1)printf("欢迎再次使用！");}if(a==6){shame:b=rand()%100;if(b<10) b=b+10;c=rand()%10;d=b*c;printf("%d*%d=?\n",b,c);printf("请输入答案：");scanf("%d",&e);while(e!=d){printf("回答错误，请重做");printf("%d*%d=?\n",b,c);printf("请输入答案：");scanf("%d",&e);}printf("回答正确!是否做下一题？\n");printf("输入0表示是，输入1表示否\n");scanf("%d",&f);if(f==0)goto shame;if(f==1)printf("欢迎再次使用！");}if(a==7){yeah:b=rand()%100;c=rand()%100;if(b<10) b=b+10;if(c<10) c=c+10;d=b*c;printf("%d*%d=?\n",b,c);printf("请输入答案：");scanf("%d",&e);while(e!=d){printf("回答错误，请重做");printf("%d*%d=?\n",b,c);printf("请输入答案：");scanf("%d",&e);}printf("回答正确!是否做下一题？\n");printf("输入0表示是，输入1表示否\n");scanf("%d",&f);if(f==0)goto yeah;if(f==1)printf("欢迎再次使用！");}}if(a==4){printf("5,一位数除一位数\n");printf("6,两位数除一位数\n");printf("7,两位数除两位数\n");printf("请输入题型:");scanf("%d",&a);while(a<5||a>7){printf("输入错误,请重新输入");scanf("%d",&a);}if(a==5){hit: b=rand()%10;c=rand()%10;{if (b>c){g=b%c;if (g!=0){b=b-g;d=b/c;printf("%d/%d=?\n",b,c);}else d=b/c;printf("%d/%d=?\n",b,c);}if (c>b){g=c%b;if (g!=0){c=c-g;t=c;c=b;b=t;d=b/c;printf("%d/%d=?\n",b,c);}elset=c;c=b;b=t;d=b/c;printf("%d/%d=?\n",b,c);}printf("请输入答案：");scanf("%d",&e);}while(e!=d){printf("回答错误，请重做");printf("%d/%d=?\n",b,c);printf("请输入答案：");scanf("%d",&e);}printf("回答正确!是否做下一题？\n");printf("输入0表示是，输入1表示否\n");scanf("%d",&f);if(f==0)goto hit;if(f==1)printf("欢迎再次使用！");}if(a==6){haha:b=rand()%100;c=rand()%10;if(b<10)b=b+10;g=b%c;if (g!=0)b=b-g;d=b/c;printf("%d/%d=?\n",b,c);printf("请输入答案：");scanf("%d",&e);while(e!=d){printf("回答错误，请重做");printf("%d/%d=?\n",b,c);printf("请输入答案：");scanf("%d",&e);}printf("回答正确!是否做下一题？\n");printf("输入0表示是，输入1表示否\n");scanf("%d",&f);if(f==0)goto haha;if(f==1)printf("欢迎再次使用！");}if(a==7){over:b=rand()%100;c=rand()%100;if(b<10) b=b+10;if(c<10) c=c+10;if (b>c){g=b%c;if (g!=0){b=b-g;d=b/c;printf("%d/%d=?\n",b,c);}else{d=b/c;printf("%d/%d=?\n",b,c);}}if (c>b){g=c%b;if (g!=0){c=c-g;t=c;c=b;b=t;d=b/c;printf("%d/%d=?\n",b,c);}else{t=c;c=b;b=t;d=b/c;printf("%d/%d=?\n",b,c);}}scanf("%d",&e);while(e!=d){printf("回答错误，请重做");printf("%d/%d=?\n",b,c);printf("请输入答案：");scanf("%d",&e);}printf("回答正确!是否做下一题？\n");printf("输入0表示是，输入1表示否\n");scanf("%d",&f);if(f==0)goto over;if(f==1)printf("欢迎再次使用！");}}}。

四则运算姓名：学号：班级：1.功能结构图2.程序功能进行整数的加减乘除和求模运算。

程序采用随机产生1~100的两个数进行运算每种运算有10个题目用户输入对应的答案程序提示答案的对错最后统计正确率。

每次给出两次答题机会。

3.程序流程图4.函数列表及功能5.源程序代码#include<stdio.h>#include<stdlib.h>#include<time.h>#define N 10int f(int a,int b){ //自定义函数int result;result=a+b;return result;}int f1(int a,int b){int result;result=a-b;return result;}int f2(int a,int b){int result;result=a*b;return result;}int f3(int a,int b){int result;result=a*b/b;return result;}int mod(int a,int b){int result;result=a%b;return result;}int main(){int a,b,res,ans;int i,count;int op,c;srand((unsigned)time(NULL)); while(1){printf("\n---加减乘除运算练习系统---\n");printf("1.加法运算\n");printf("2.减法运算\n");printf("3.乘法运算\n");printf("4.除法运算\n");printf("5.求模运算\n");printf("6.混合运算\n");printf("0.退出练习\n");printf(" 请输入数字0~6:");scanf("%d",&op); //输入相应数字进行练习switch(op){case 1:printf("--请进行加法运算--\n");count=0;for(i=1;i<=N;i++){a=rand()%100+1;b=rand()%100+1;res=f(a,b); //调用加法函数printf("%d+%d=",a,b);scanf("%d",&ans); //输入数值if(ans==res){printf("Very Good!\n");count++;}else{printf("wrong! 请重新输入\n");scanf("%d",&ans);if(ans==res)printf("Very Good!\n");elseprintf("Wrong Answer!\n");}}printf("***正确率为%.0f%%***\n",100.0*count/N); break;case 2:printf("--请进行减法运算--\n");count=0;for(i=1;i<=N;i++){a=rand()%100+1;b=rand()%100+1;res=f1(a,b); //调用减法函数printf("%d-%d=",a,b);scanf("%d",&ans); //输入数值if(ans==res){printf("Very Good!\n");count++;}else{printf("wrong! 请重新输入\n");scanf("%d",&ans);if(ans==res)printf("Very Good!\n");elseprintf("Wrong Answer!\n");}}printf("***正确率为%.0f%%***\n",100.0*count/N); break;case 3:printf("--请进行乘法运算--\n");count=0;for(i=1;i<=N;i++){a=rand()%100+1;b=rand()%100+1;res=f2(a,b); //调用乘法函数printf("%d*%d=",a,b);scanf("%d",&ans); //输入数值if(ans==res){printf("Very Good!\n");count++;}else{printf("wrong! 请重新输入\n");scanf("%d",&ans);if(ans==res)printf("Very Good!\n");elseprintf("Wrong Answer!\n");}}printf("***正确率为%.0f%%***\n",100.0*count/N); break;case 4:printf("--请进行除法运算--\n");count=0;for(i=1;i<=N;i++){a=rand()%10+1;b=rand()%10+1;res=f3(a,b); //调用除法函数printf("%d/%d=",a*b,b);scanf("%d",&ans); //输入数值if(ans==res){printf("Very Good!\n");count++;}else{printf("wrong! 请重新输入\n");scanf("%d",&ans);if(ans==res)printf("Very Good!\n");elseprintf("Wrong Answer!\n");}}printf("***正确率为%.0f%%***\n",100.0*count/N); break;case 6:printf("--请进行混合运算--\n");count=0;for(i=1;i<=N;i++){a=rand()%100+1;b=rand()%100+1;c=rand()%5; //产生0~4的随机数{switch(c) //随机出现进行混合运算{case 0:printf("%d+%d=",a,b);res=f(a,b);break;case 1:printf("%d-%d=",a,b);res=f1(a,b);break;case 2:printf("%d*%d=",a,b);res=f2(a,b);break;case 3:a=a%10+1;b=b%10+1;printf("%d/%d=",a*b,b);res=f3(a,b);break;case 4:printf("%d%%%d=",a,b);res=mod(a,b);break;}}scanf("%d",&ans); //输入数值if(ans==res){printf("Very Good!\n");count++;}else{printf("wrong! 请重新输入\n");scanf("%d",&ans);if(ans==res)printf("Very Good!\n");elseprintf("Wrong Answer!\n");}}printf("***正确率为%.0f%%***\n",100.0*count/N); break;case 5:printf("--请进行求模运算--\n");count=0;for(i=1;i<=N;i++){a=rand()%100+1;b=rand()%100+1;res=mod(a,b); //调用求模函数printf("%d%%%d=",a,b);scanf("%d",&ans); //输入数值if(ans==res){printf("Very Good!\n");count++;}else{printf("wrong! 请重新输入\n");scanf("%d",&ans);if(ans==res)printf("Very Good!\n");elseprintf("Wrong Answer!\n");}}printf("***正确率为%.0f%%***\n",100.0*count/N); break;case 0:goto END; //转到结束}}END:printf("---练习结束---\n");return 0;}6程序运行图选取起始和加法混合运算程序开始显示6种练习方式输入0为退出。

四则运算c语言编程四则运算是数学中常见的基本运算，也是编程语言中必须掌握的基本知识。

在C语言中，四则运算包括加、减、乘、除四个基本运算。

本文将介绍C语言中四则运算的使用方法和注意事项。

加法运算加法运算是最基本的运算之一，C语言中使用“+”符号进行加法运算。

例如，计算两个整数a和b的和，可以使用以下代码：int a = 5;int b = 3;int sum = a + b;printf("sum = %d\n", sum);在这个例子中，首先定义了两个整数a和b，并将它们相加得到sum变量的值。

最后使用printf函数将sum的值输出到屏幕上。

减法运算减法运算也是常见的运算之一，C语言中使用“-”符号进行减法运算。

例如，计算两个整数a和b的差，可以使用以下代码：int a = 5;int b = 3;int diff = a - b;printf("diff = %d\n", diff);在这个例子中，首先定义了两个整数a和b，并将它们相减得到diff变量的值。

最后使用printf函数将diff的值输出到屏幕上。

乘法运算乘法运算也是常见的运算之一，C语言中使用“*”符号进行乘法运算。

例如，计算两个整数a和b的积，可以使用以下代码：int a = 5;int b = 3;int product = a * b;printf("product = %d\n", product);在这个例子中，首先定义了两个整数a和b，并将它们相乘得到product变量的值。

最后使用printf函数将product的值输出到屏幕上。

除法运算除法运算也是常见的运算之一，C语言中使用“/”符号进行除法运算。

例如，计算两个整数a和b的商，可以使用以下代码：int a = 5;int b = 3;int quotient = a / b;printf("quotient = %d\n", quotient);在这个例子中，首先定义了两个整数a和b，并将它们相除得到quotient变量的值。

c语言四则运算要求，输入两个数每行加减乘除C语言是一种强大的编程语言，可以用于实现各种各样的功能。

其中，四则运算是基本的数学运算，包括加法、减法、乘法和除法。

在这篇文章中，我将详细介绍C语言中实现四则运算的要求。

首先，我们需要了解C语言的基本语法，包括变量的声明和赋值、输入输出语句以及运算符的使用。

在C语言中，我们可以使用int类型的变量来存储整数，使用float或double类型的变量来存储浮点数。

对于加法运算，我们可以使用加号“+”来实现。

例如，如果我们想计算两个整数a和b的和，可以使用下面的语句：```cint a, b, sum;a = 10;b = 20;sum = a + b;printf("两数之和为：%d\n", sum);```在上面的代码中，我们首先声明了三个变量a、b和sum，其中sum用来存储a和b的和。

然后，我们分别给a和b赋值，并使用加号运算符将它们相加。

最后，我们使用printf函数将结果输出到屏幕上。

类似地，减法运算可以使用减号“-”来实现。

例如，我们想计算两个整数a和b的差，可以使用下面的代码：```cint a, b, difference;a = 10;b = 20;difference = a - b;printf("两数之差为：%d\n", difference);```上面的代码中，我们将a和b相减，并将结果存储在difference 变量中，然后输出结果到屏幕上。

乘法运算可以使用星号“*”来实现。

例如，我们想计算两个整数a和b的积，可以使用下面的代码：```cint a, b, product;a = 10;b = 20;product = a * b;printf("两数之积为：%d\n", product);```在上面的代码中，我们将a和b相乘，然后将结果存储在product 变量中，并将结果输出到屏幕上。

大一c语言编程四则运算在学习C语言过程中，四则运算是我们最常接触的基础知识之一。

四则运算包括加、减、乘、除四种基本运算，本文将以大一C语言编程四则运算为主题，详细介绍四则运算的实现方法和注意点。

一、加法运算加法运算是最简单的运算之一，只需要使用“+”符号即可实现。

例如，将两个整数a和b相加，可以使用以下代码实现：int a = 10;int b = 20;int c = a + b;其中，a和b为要相加的两个整数，c为保存结果的变量。

二、减法运算减法运算与加法运算类似，只需要使用“-”符号即可实现。

例如，将两个整数a和b相减，可以使用以下代码实现：int a = 20;int b = 10;int c = a - b;其中，a和b为要相减的两个整数，c为保存结果的变量。

三、乘法运算乘法运算需要使用“*”符号。

例如，将两个整数a和b相乘，可以使用以下代码实现：int a = 10;int b = 20;int c = a * b;其中，a和b为要相乘的两个整数，c为保存结果的变量。

需要注意的是，如果a和b中有一个是浮点数，那么结果也会是浮点数。

四、除法运算除法运算需要使用“/”符号。

例如，将两个整数a和b相除，可以使用以下代码实现：int a = 20;int b = 10;int c = a / b;其中，a和b为要相除的两个整数，c为保存结果的变量。

需要注意的是，如果a和b中有一个是浮点数，那么结果也会是浮点数。

此外，如果b为0，程序将会出现除0错误。

五、复合运算除了基本的四则运算外，还有一些复合运算，例如加等于和减等于运算。

例如，将变量a加上10，可以使用以下代码实现：int a = 10;a += 10;其中，a += 10等价于a = a + 10。

减等于运算同理。

六、小数运算除了整数运算外，C语言还支持小数运算。

小数运算需要使用浮点型变量，例如：float a = 1.23;float b = 4.56;float c = a + b;其中，a和b为要相加的两个浮点数，c为保存结果的变量。

C语言编写四则运算#include<stdio.h>//计算器#include<malloc.h>#define STACK_SIZE100 //max size of the stack#define STACK_INCREMENT10 //realloc sizetypedef struct FStack//stack of int{float* base;float* top;int stacksize;}FStack;void Init(FStack* s){s->base = (float*)malloc(STACK_SIZE * sizeof(FStack));if (!s->base){printf("overflow!\n");return;}s->top = s->base;s->stacksize = STACK_SIZE;}bool isEmpty(FStack* s){if (s->top == s->base){return true;}else{return false;}}void Push(FStack* s, float e){if (s->top - s->base >= s->stacksize){printf("stack is full!\nrealloc %d\n", STACK_INCREMENT);s->base = (float*)realloc(s->base, (s->stacksize +sizeof(FStack)));if (!s->base){printf("overflow!\n");return;}s->top = s->base + s->stacksize;s->stacksize += STACK_INCREMENT;}*(s->top) = e;(s->top)++;}float GetTop(FStack* s){if (s->top == s->base){printf("stack is empty!\n");return 0;}float e = *(s->top - 1);return e;}void Pop(FStack* s){if (s->top == s->base){printf("stack is empty!\n");return;}s->top--;}typedef struct CStack//stack of char{char* base;char* top;int stacksize;}CStack;void Init(CStack* s){s->base = (char*)malloc(STACK_SIZE * sizeof(CStack));if (!s->base){printf("overflow!\n");return;}s->top = s->base;s->stacksize = STACK_SIZE;}bool isEmpty(CStack* s){if (s->top == s->base){return true;}else{return false;}}void Push(CStack* s, int e){if (s->top - s->base >= s->stacksize){printf("stack is full!\nrealloc %d\n", STACK_INCREMENT);s->base = (char*)realloc(s->base, (s->stacksize +sizeof(CStack)));if (!s->base){printf("overflow!\n");return;}s->top = s->base + s->stacksize;s->stacksize += STACK_INCREMENT;}*(s->top) = e;(s->top)++;}char GetTop(CStack* s){if (s->top == s->base){printf("stack is empty!\n");return 0;}char e = *(s->top - 1);return e;}void Pop(CStack* s){if (s->top == s->base){printf("stack is empty!\n");return;}s->top--;}bool isOper(char ch){if (ch == '+' || ch == '-' || ch == '*' || ch == '/' || ch == '%') {return true;}else{return false;}}int Priority(char ch){int p;switch(ch){case'(':p = 0;break;case'+':case'-':p = 1;break;case'*':case'/':case'%':p = 2;break;}return p;}float Calculate(float f1, float f2, char oper) {float f3;switch(oper){case'+':f3 = f1 + f2;break;case'-':f3 = f1 - f2;break;case'*':f3 = f1 * f2;break;case'%':f3 = (float)((int)f1 % (int)f2);break;case'/':if (f2 == 0){printf("\nDevided by zero!");exit(1);}else{f3 = f1 / f2;}break;}return f3;}float StrtoFloat(char* str, int* pos){float fRes;int i = *pos;int k;char n[50];for(k= 0; str[i] >= '0'&& str[i] <= '9'|| str[i] == '.'; i++, k++) {n[k] = str[i];}n[k] = '\0';*pos = i;fRes = atof(n);return fRes;}bool Check(char* str){int i = 0;while (str[i] != '\0'){if (str[i] != '+' && str[i] != '-' && str[i] != '*' && str[i] != '/' && str[i] != '%' && str[i] != '.' && str[i] != '(' && str[i] != ')' && (str[i] < '0' || str[i] > '9')){return false;}i++;}return true;}void main(){char exp[100];int i;float f, f1, f2;char oper;FStack fstack;CStack cstack;Init(&fstack);Init(&cstack);printf("The expression is:");gets(exp);if (!Check(exp)){printf("input error! exit now!\n");exit(1);}for (i = 0; exp[i] != '\0' && exp[i] != -52; i++){if (!isOper(exp[i])){f = StrtoFloat(exp, &i);Push(&fstack, f);}if (isOper(exp[i])){if (!isEmpty(&cstack)){while (!isEmpty(&cstack) && Priority(exp[i]) <= Priority(GetTop(&cstack))){oper = GetTop(&cstack);Pop(&cstack);f2 = GetTop(&fstack);Pop(&fstack);f1 = GetTop(&fstack);Pop(&fstack);f = Calculate(f1, f2, oper);Push(&fstack, f);}Push(&cstack, exp[i]);}else{Push(&cstack, exp[i]);}}else if (exp[i] == '('){Push(&cstack, exp[i]);}else if (exp[i] == ')'){while (GetTop(&cstack) != '(' && !isEmpty(&cstack)){oper = GetTop(&cstack);Pop(&cstack);f2 = GetTop(&fstack);Pop(&fstack);f1 = GetTop(&fstack);Pop(&fstack);f = Calculate(f1, f2, oper);Push(&fstack, f);}Pop(&cstack);}}while (!isEmpty(&cstack)){oper = GetTop(&cstack);Pop(&cstack);f2 = GetTop(&fstack);Pop(&fstack);f1 = GetTop(&fstack);Pop(&fstack);f = Calculate(f1, f2, oper);Push(&fstack, f);}printf("\nThe result is:%f\n", GetTop(&fstack));Pop(&fstack);}。

C语⾔实现⼤数四则运算⼀、简介众所周知，C语⾔中INT类型是有限制，不能进⾏超过其范围的运算，⽽如果采⽤float类型进⾏运算，由于float在内存中特殊的存储形式，⼜失去了计算的进度。

要解决整个问题，⼀种解决⽅法是通过字符串数组实现数据的存储，然后实现它们之间四则运算的函数。

⼆、数据结构为了实现字符数组之间的运算，要考虑数值的正负性，数字的长度以及具体存储的数字typedef struct num{int len; //数值长度char symbol; //数字正负形int number[LEN]; //数组}NUM,*SNUM;三、函数整个程序使⽤了⼀下的函数SNUM expToNum(char exp[]);//将输⼊字符串转换为对应结构体void reverse(int a[],int len);//数组逆序int compareAbs(SNUM left,SNUM right);//⽐较两数绝对值⼤⼩SNUM anti_add(SNUM left,SNUM right);//元加法SNUM anti_sub(SNUM left,SNUM right);//元减法SNUM add(SNUM left,SNUM right); //加法SNUM sub(SNUM left,SNUM right); //减法SNUM multiply(SNUM left,SNUM right); //乘法SNUM divide(SNUM left,SNUM right); //除法SNUM mod(SNUM left,SNUM right);//求摸运算函数的定义1 SNUM multiply(SNUM left,SNUM right){2//left作为被乘数，right作为乘数3 SNUM mul = (struct num*)malloc(sizeof(struct num));4int i,j;5for(i=0;i<LEN;i++){6 mul->number[i]=0;7 }89if(left->symbol==right->symbol){10 mul->symbol='+';11 }else{12 mul->symbol='-';13 }14151617for(i=0;i<right->len;i++){18for(j=0;j<left->len;j++){19 mul->number[i+j]+=left->number[j]*right->number[i];20 }21 }22232425////进位化简26int len = left->len+right->len-1; //长度2728//29for(i=0;i<len;i++){30 mul->number[i+1]+=mul->number[i]/10;31 mul->number[i]%=10;3233if(i==len-1){34if(mul->number[i+1]!=0){ //还存在⾼位35 len++;36 }else{ //进位完毕，退出37break;38 }39 }40 }4145for(i=len-1;i>=0;i--){46if(mul->number[i]==0){47 len--;48 }else{49break;50 }51 }52if(len==0){53 len=1;54 }5556 mul->len=len;5758free(left);59free(right);60return mul;61 }62636465//减⼀个数等于加上⼀个数的相反数66 SNUM sub(SNUM left,SNUM right){67 right->symbol=(right->symbol=='+'?'-':'+');68return add(left,right);69 }7071//⽐较两数绝对值⼤⼩72int compareAbs(SNUM left,SNUM right){73if(left->len>right->len){ //left的位数更多74return1;75 }else if(left->len<right->len){ //right的位数更多76return -1;77 }else{78int i=left->len-1;79while(i>=0){ //从⾼位开始⽐较80if(left->number[i]>right->number[i]){81return1;82 }83if(left->number[i]<right->number[i]){84return -1;85 }86 i--;87 }88return0; //两者绝对值相等89 }90 }919293 SNUM expToNum(char exp[]){9495 SNUM temp=(struct num*)malloc(sizeof(struct num)); 9697int locan=0;98//确定正负号99if(exp[0]=='+'||exp[0]=='-'){100 temp->symbol=exp[0];101 locan++;102 }else{103 temp->symbol='+';104 }105106//输⼊到数组107int count=0;108while(exp[locan]!='\0'){109 temp->number[count]=exp[locan]-'0';110 locan++;111 count++;112 }113114int i=count;115for(i=count;i<LEN-1;i++){116 temp->number[i]=0;117 }118119 temp->len=count;120121122//数组逆序从个位开始计算123 reverse(temp->number,temp->len);124125return temp;129void reverse(int a[],int len){130int i,temp;131for(i=0;i<len/2;i++){132 temp = a[i];133 a[i] = a[len-1-i];134 a[len-1-i] = temp;135 }136 }137138139140//元加法，假设left和right都为正数或0141 SNUM anti_add(SNUM left,SNUM right){142int i=0;143144while(i<left->len||i<right->len){145int sum=0;146 sum=left->number[i]+right->number[i]; 147if(sum>=10){148 left->number[i]=sum%10;149 left->number[i+1]+=sum/10; //进位150 }else{151 left->number[i]=sum; //不进位152 }153154 i++;155 }156157if(left->number[i]!=0){158 i+=1;159 }160161 left->len=i;162return left;163 }164165//实现正数或负数的加法166 SNUM add(SNUM left,SNUM right){167 SNUM temp;168if(left->symbol==right->symbol){169 temp = anti_add(left,right);170 }else{171if(compareAbs(left,right)>=0){172 temp = anti_sub(left,right);173174 }else{175 temp = anti_sub(right,left);176 }177 }178return temp;179 }180181//元减法,假设left>=right，left和right均为正数或0 182 SNUM anti_sub(SNUM left,SNUM right){183int i=0;184int count=0;185while(i<left->len){186int temp = left->number[i]-right->number[i]; 187if(temp<0){188 left->number[i+1]-=1;189 left->number[i]=temp+10; //退位190 }else{191 left->number[i]=temp;192 }193194 count+=1;195196 i++;197 }198199200201202//舍掉多余的0203for(i=count-1;i>=0;i--){204if(left->number[i]==0){205 count--;206 }else{207break;208 }213 }214215 left->len=count; 216return left;217218 }。

c语言实现分数的四则运算C语言可以很方便地实现分数的四则运算。

分数可以表示为两个整数的比值，我们可以通过定义一个分数结构体来表示分数，并定义四个函数分别实现分数的加减乘除。

分数结构体可以定义为：```struct Fraction {int numerator; // 分子int denominator; // 分母};```加法函数可以定义为：```struct Fraction add(struct Fraction a, struct Fraction b) {struct Fraction res;res.numerator = a.numerator * b.denominator + b.numerator * a.denominator;res.denominator = a.denominator * b.denominator;return res;}```减法函数可以定义为：```struct Fraction sub(struct Fraction a, struct Fraction b) {struct Fraction res;res.numerator = a.numerator * b.denominator - b.numerator * a.denominator;res.denominator = a.denominator * b.denominator;return res;}```乘法函数可以定义为：```struct Fraction mul(struct Fraction a, struct Fraction b) {struct Fraction res;res.numerator = a.numerator * b.numerator;res.denominator = a.denominator * b.denominator;return res;}```除法函数可以定义为：```struct Fraction div(struct Fraction a, struct Fraction b) {struct Fraction res;res.numerator = a.numerator * b.denominator;res.denominator = a.denominator * b.numerator;return res;}```通过以上函数可以实现分数的四则运算。

四则运算（c语⾔）博客班级作业要求作业⽬标能够实现四则运算⼩程序的基本需求，同时练习写博客（排版等）学号3190704217⼆. 题⽬要求写⼀个能⾃动⽣成⼩学四则运算题⽬的程序，然后在此基础上扩展：1）除了整数以外，还要⽀持真分数的四则运算，例如：1/6+1/8=7/242）程序要求能处理⽤户的输⼊，判断对错，累积分数3）程序⽀持可以由⽤户⾃⾏选择加、减、乘、除运算4）使⽤-n参数控制⽣成题⽬的个数，例如Myapp.exe -n 10，将⽣成10个题⽬三. 代码#include <stdio.h>#include <stdlib.h>#include <time.h>#include <math.h>int s;//答对的题⽬数量float score;//得分(百分制)//判断答案是否正确void judge0(float a,float ta) //专为除法提供判断函数{float error=a-ta;//计算结果与真正答案的误差⼩于⼀定值if((error<=0.005)&&(error>=-0.004)){printf("回答正确！\n");s++;}elseprintf("回答错误，正确答案是 %.2f\n",ta);}void judge(int a,int ta) //加法减法，乘法的判断函数{if(a==ta){printf("回答正确！\n");s++;}elseprintf("回答错误，正确答案是 %d\n",ta);}void judge1(int a1,int a2,float ta) //真分数运算的判断函数{float a=(float)a1/(float)a2;if(a==ta){printf("回答正确！\n");s++;}elseprintf("回答错误，正确答案是 %.2f\n",ta);}//真分数的随机运算int random0(){int num,i=0;printf("请输⼊题⽬数量\n");scanf("%d",&num);srand(unsigned(time(NULL)));while(i<num){int type;//运算类型，加减乘除int left1,left2,right1,right2;int answer1,answer2;float trueanswer;left1= rand() % 100;left2= rand() % 100;type = rand() % 4;if(left1>left2) //转化为真分数{int t;t=left1;left2=left1;left1=t;}right1 = rand() % 100;right2 = rand() % 100;if(right1>right2)//转化为真分数{int t;t=right1;right2=right1;right1=t;}switch(type){case 0:trueanswer=((float)left1/(float)left2)+((float)right1/(float)right2); printf("%d/%d + %d/%d = ", left1, left2,right1,right2);scanf("%d/%d",&answer1,&answer2);judge1(answer1,answer2,trueanswer);break;case 1:trueanswer=((float)left1/(float)left2)-((float)right1/(float)right2); printf("%d/%d - %d/%d = ", left1, left2,right1,right2);scanf("%d/%d",&answer1,&answer2);judge1(answer1,answer2,trueanswer);break;case 2:trueanswer=((float)left1/(float)left2)*((float)right1/(float)right2); printf("%d/%d * %d/%d = ", left1, left2,right1,right2);scanf("%d/%d",&answer1,&answer2);judge1(answer1,answer2,trueanswer);break;case 3:trueanswer=((float)left1/(float)left2)/((float)right1/(float)right2); printf("%d/%d / %d/%d = ", left1, left2,right1,right2);scanf("%d/%d",&answer1,&answer2);judge1(answer1,answer2,trueanswer);break;}i++;}return num;}// 整数的随机运算int random(){int num,i=0;printf("请输⼊题⽬数量\n");scanf("%d",&num);srand(unsigned(time(NULL)));while(i<num){int type;//运算类型int left, right;int answer,trueanswer;left = rand() % 100;type = rand() % 4;right = rand() % 100;switch(type){case 0:trueanswer=left+right;printf("%d + %d = ", left, right); scanf("%d",&answer);judge(answer,trueanswer); break;case 1:trueanswer=left-right;printf("%d - %d = ", left, right); scanf("%d",&answer);judge(answer,trueanswer); break;case 2:trueanswer=left*right;printf("%d * %d = ", left, right); scanf("%d",&answer);judge(answer,trueanswer); break;case 3:float answer0,trueanswer0; trueanswer0=((float)left)/((float)right); printf("%d /%d = ", left, right);scanf("%f",&answer0);judge0(answer0,trueanswer0); break;}i++;}return num;}//加法int add(){int num,i=0;printf("请输⼊题⽬数量\n");scanf("%d",&num);srand(unsigned(time(NULL))); while(i<num){int left, right,answer,trueanswer;left = rand() % 100;right = rand() % 100;trueanswer=left+right;printf("%d +%d = ", left, right); scanf("%d",&answer);judge(answer,trueanswer);i++;}return num;}//减法int subtract(){int num,i=0;printf("请输⼊题⽬数量\n");scanf("%d",&num);srand(unsigned(time(NULL))); while(i<num){int left, right,answer,trueanswer; left = rand() % 100;right = rand() % 100; trueanswer=left-right;printf("%d -%d = ", left, right); scanf("%d",&answer);judge(answer,trueanswer);i++;}return num;}//乘法int multiply(){int num,i=0;printf("请输⼊题⽬数量\n");scanf("%d",&num);srand(unsigned(time(NULL))); while(i<num){int left, right,answer,trueanswer; left = rand() % 100;right = rand() % 100; trueanswer=left*right;printf("%d *%d = ", left, right); scanf("%d",&answer);judge(answer,trueanswer);i++;}return num;}//除法int divide(){int num,i=0;printf("请输⼊题⽬数量\n");scanf("%d",&num);srand(unsigned(time(NULL))); while(i<num){int left, right;float answer,trueanswer;left = rand() % 100;right = rand() % 100; trueanswer=((float)left)/((float)right); printf("%d /%d = ", left, right); scanf("%f",&answer);judge0(answer,trueanswer);i++;}return num;}//打印界⾯提⽰信息void main(){printf("welcome！\n");printf("\n");int choose,t;do{s=0;score=0;int n;printf("********************四则运算********************\n");printf("\n");printf(" 1.随即题⽬\n");printf(" 2.加法题⽬\n");printf(" 3.减法题⽬\n");printf(" 4.乘法题⽬\n");printf(" 5.除法题⽬\n");printf(" 6.分数运算\n");printf(" 7.退出\n");printf("\n");printf("******************Designed by 吴⼭茶******************\n");printf("\n");printf("请选择计算类型：");scanf("%d",&t);choose=t;printf("%d",choose);printf("\n");system("cls");switch(choose){case 1:n=random();printf("\n");break;case 2:n=add();printf("\n");break;case 3:n=subtract();printf("\n");break;case 4:n=multiply();printf("\n");break;case 5:n=divide();printf("\n");break;case 6:n=random0();printf("\n");break;default:break;}score=(float)s/(float)n;printf("得分：%.2f\n",score);}while(choose!=7);exit(0);}三.运⾏结果1.显⽰界⾯2.加法运算3.随机运算4.真分数运算任务内容计划完成需要的时间（min）实际完成需要的时间（min）计划1020任务内容计划完成需要的时间（min）实际完成需要的时间（min）估计这个任务需要多少时间，并规划⼤致⼯作步骤55开发00需求分析（包括学习新技术）1010⽣成设计⽂档00设计复审1530代码规范55具体设计2020具体编码150180代码复审1010报告00测试报告00计算⼯作量300330+事后总结，并提出过程改进计划2010。

⽤C语⾔编程⾃动⽣成四则运算#include<stdio.h>#include<stdlib.h>#include <time.h>#define N 30main(){int a,b,k,i,n;float c,d;srand(time(NULL));do{printf("\n请输⼊数字类型(1.整数 2.⼩数) -1为退出程序: ");scanf("%d",&n);switch(n){case 1:{for(i=0;i<N;i++){a=rand()%100+1;b=rand()%100+1;k=rand()%4+1;printf("%d",a);switch(k){case 1:printf("+");break;case 2:printf("-");break;case 3:printf("*");break;case 4:printf("/");break;}printf("%d=\t\t",b);}break;}break;case 2:{for(i=0;i<N;i++){c=rand()*0.001+1;d=rand()*0.001+1;k=rand()%4+1;printf("%0.2f",c);switch(k){case 1:printf("+");break;case 2:printf("-");break;case 3:printf("*");break;case 4:printf("/");break;}printf("%0.2f=\t",d);}break;}break;}}while(n!=-1);}感想：这个实验虽然是⼀个简单的实验，但是过程却是有许多的收获的。

c语言四则运算程序本文将介绍一个简单的C语言程序，它可以实现四则运算。

四则运算是数学学科中最基础的计算方法之一，包括加、减、乘、除四个运算符。

通过本程序，您可以输入两个数和运算符，程序将自动计算并输出结果。

具体实现方法如下：1.首先，我们需要定义三个变量，分别代表输入的两个数和运算符。

这里我们使用float类型，以支持小数计算。

2.接着，我们需要使用scanf函数从键盘读入这三个变量的值。

scanf函数可以将输入的字符转换为相应的数据类型，这里我们可以使用“%f”读取浮点数，使用“%c”读取字符。

3.接下来，我们使用switch语句对输入的运算符进行判断。

根据不同的运算符，我们执行相应的计算，最终将结果输出到屏幕上。

4.在程序的结尾，我们可以使用return 0;语句来结束程序的执行。

下面是完整的C语言四则运算程序代码：#include <stdio.h>int main() {float num1, num2, result;char op;printf('请输入两个数和运算符，用空格隔开：');scanf('%f %f %c', &num1, &num2, &op); switch (op) {case '+':result = num1 + num2;printf('%.2f + %.2f = %.2f', num1, num2, result);break;case '-':result = num1 - num2;printf('%.2f - %.2f = %.2f', num1, num2, result);break;case '*':result = num1 * num2;printf('%.2f * %.2f = %.2f', num1, num2, result);break;case '/':if (num2 == 0) {printf('除数不能为0！');} else {result = num1 / num2;printf('%.2f / %.2f = %.2f', num1, num2, result);}break;default:printf('运算符错误！');}return 0;}通过以上程序，您可以轻松地进行四则运算，提高计算效率。

c语言实现分数的四则运算1. 前言分数，是我们初中数学学习的必修课程之一。

尽管在现实生活中或商业运营中，我们几乎不会用到分数的四则运算，但在计算机科学领域中，这个概念却显得尤为重要。

在这篇文章中，我们将会探究如何用C语言实现分数的四则运算，希望能对学习C语言和分数的学习者们有所帮助。

2. 定义分数结构体在C语言中，我们可以用结构体来定义一个分数类型。

一个分数包含两个整数：分子和分母。

因此，我们可以这样定义一个分数结构体：```cstruct fraction {int numerator; // 分子int denominator; // 分母};```3. 分数约分我们知道，约分是化简分数的一种基本方法，可以减少计算过程中分数的复杂性。

所以，在进行分数的四则运算之前，我们需要先将分数化简为最简形式。

例如，分数12/16可以化简为3/4，而分数6/9可以化简为2/3。

如何实现分数的约分呢？我们可以通过求出分子和分母的最大公约数（GCD），然后将它们同时除以这个最大公约数，从而得到最简形式的分数。

这样约分的好处在于能够节省内存和计算时间，同时也便于与其它化简后的分数进行比较。

下面是一个实现分数约分的函数：```cint gcd(int a, int b) { // 辗转相除法求最大公约数return (b == 0) ? a : gcd(b, a % b);}void reduce_fraction(struct fraction* f) {int g = gcd(f->numerator, f->denominator);f->numerator /= g;f->denominator /= g;}```该函数将传入的分数指针所指向的分数约去最简形式。

具体而言，我们先调用gcd函数求出分子和分母的最大公约数g，然后再将分子和分母都除以g，从而得到最简形式的分数。

4. 分数加减乘除有了分数约分函数后，我们便可以开始实现分数的四则运算。

C语言编写四则运算#include<> ; i++, k++){n[k] = str[i];}n[k] = '\0';*pos = i;fRes = atof(n);return fRes;}bool Check(char* str){int i = 0;while (str[i] != '\0'){if(str[i] != '+'&& str[i] != '-'&& str[i] != '*'&& str[i] != '/' && str[i] != '%' && str[i] != '.' && str[i] != '(' && str[i] != ')' && (str[i] < '0' || str[i] > '9')){return false;}i++;}return true;}void main(){char exp[100];int i;float f, f1, f2;char oper;FStack fstack;CStack cstack;Init(&fstack);Init(&cstack);printf("The expression is:");gets(exp);if (!Check(exp)){printf("input error! exit now!\n");exit(1);}for (i = 0; exp[i] != '\0' && exp[i] != -52; i++){if (!isOper(exp[i])){f = StrtoFloat(exp, &i);Push(&fstack, f);}if (isOper(exp[i])){if (!isEmpty(&cstack)){while (!isEmpty(&cstack) && Priority(exp[i]) <= Priority(GetTop(&cstack))){oper = GetTop(&cstack);Pop(&cstack);f2 = GetTop(&fstack);Pop(&fstack);f1 = GetTop(&fstack);Pop(&fstack);f = Calculate(f1, f2, oper);Push(&fstack, f);}Push(&cstack, exp[i]);}else{Push(&cstack, exp[i]);}}else if (exp[i] == '('){Push(&cstack, exp[i]);}else if (exp[i] == ')'){while (GetTop(&cstack) != '(' && !isEmpty(&cstack)) {oper = GetTop(&cstack);Pop(&cstack);f2 = GetTop(&fstack);Pop(&fstack);f1 = GetTop(&fstack);Pop(&fstack);f = Calculate(f1, f2, oper);Push(&fstack, f);}Pop(&cstack);}}while (!isEmpty(&cstack)){oper = GetTop(&cstack);Pop(&cstack);f2 = GetTop(&fstack);Pop(&fstack);f1 = GetTop(&fstack);Pop(&fstack);f = Calculate(f1, f2, oper);Push(&fstack, f);}printf("\nThe result is:%f\n", GetTop(&fstack));Pop(&fstack);}。

C语言编写四则运算#include<stdio.h>//计算器#include<malloc.h>#define STACK_SIZE100 //max size of the stack#define STACK_INCREMENT10 //realloc sizetypedef struct FStack//stack of int{float* base;float* top;int stacksize;}FStack;void Init(FStack* s){s->base = (float*)malloc(STACK_SIZE * sizeof(FStack));if (!s->base){printf("overflow!\n");return;}s->top = s->base;s->stacksize = STACK_SIZE;}bool isEmpty(FStack* s){if (s->top == s->base){return true;}else{return false;}}void Push(FStack* s, float e){if (s->top - s->base >= s->stacksize){printf("stack is full!\nrealloc %d\n", STACK_INCREMENT);s->base = (float*)realloc(s->base, (s->stacksize +sizeof(FStack)));if (!s->base){printf("overflow!\n");return;}s->top = s->base + s->stacksize;s->stacksize += STACK_INCREMENT;}*(s->top) = e;(s->top)++;}float GetTop(FStack* s){if (s->top == s->base){printf("stack is empty!\n");return 0;}float e = *(s->top - 1);return e;}void Pop(FStack* s){if (s->top == s->base){printf("stack is empty!\n");return;}s->top--;}typedef struct CStack//stack of char{char* base;char* top;int stacksize;}CStack;void Init(CStack* s){s->base = (char*)malloc(STACK_SIZE * sizeof(CStack));if (!s->base){printf("overflow!\n");return;}s->top = s->base;s->stacksize = STACK_SIZE;}bool isEmpty(CStack* s){if (s->top == s->base){return true;}else{return false;}}void Push(CStack* s, int e){if (s->top - s->base >= s->stacksize){printf("stack is full!\nrealloc %d\n", STACK_INCREMENT);s->base = (char*)realloc(s->base, (s->stacksize +sizeof(CStack)));if (!s->base){printf("overflow!\n");return;}s->top = s->base + s->stacksize;s->stacksize += STACK_INCREMENT;}*(s->top) = e;(s->top)++;}char GetTop(CStack* s){if (s->top == s->base){printf("stack is empty!\n");return 0;}char e = *(s->top - 1);return e;}void Pop(CStack* s){if (s->top == s->base){printf("stack is empty!\n");return;}s->top--;}bool isOper(char ch){if (ch == '+' || ch == '-' || ch == '*' || ch == '/' || ch == '%') {return true;}else{return false;}}int Priority(char ch){int p;switch(ch){case'(':p = 0;break;case'+':case'-':p = 1;break;case'*':case'/':case'%':p = 2;break;}return p;}float Calculate(float f1, float f2, char oper) {float f3;switch(oper){case'+':f3 = f1 + f2;break;case'-':f3 = f1 - f2;break;case'*':f3 = f1 * f2;break;case'%':f3 = (float)((int)f1 % (int)f2);break;case'/':if (f2 == 0){printf("\nDevided by zero!");exit(1);}else{f3 = f1 / f2;}break;}return f3;}float StrtoFloat(char* str, int* pos){float fRes;int i = *pos;int k;char n[50];for(k= 0; str[i] >= '0'&& str[i] <= '9'|| str[i] == '.'; i++, k++) {n[k] = str[i];}n[k] = '\0';*pos = i;fRes = atof(n);return fRes;}bool Check(char* str){int i = 0;while (str[i] != '\0'){if (str[i] != '+' && str[i] != '-' && str[i] != '*' && str[i] != '/' && str[i] != '%' && str[i] != '.' && str[i] != '(' && str[i] != ')' && (str[i] < '0' || str[i] > '9')){return false;}i++;}return true;}void main(){char exp[100];int i;float f, f1, f2;char oper;FStack fstack;CStack cstack;Init(&fstack);Init(&cstack);printf("The expression is:");gets(exp);if (!Check(exp)){printf("input error! exit now!\n");exit(1);}for (i = 0; exp[i] != '\0' && exp[i] != -52; i++){if (!isOper(exp[i])){f = StrtoFloat(exp, &i);Push(&fstack, f);}if (isOper(exp[i])){if (!isEmpty(&cstack)){while (!isEmpty(&cstack) && Priority(exp[i]) <= Priority(GetTop(&cstack))){oper = GetTop(&cstack);Pop(&cstack);f2 = GetTop(&fstack);Pop(&fstack);f1 = GetTop(&fstack);Pop(&fstack);f = Calculate(f1, f2, oper);Push(&fstack, f);}Push(&cstack, exp[i]);}else{Push(&cstack, exp[i]);}}else if (exp[i] == '('){Push(&cstack, exp[i]);}else if (exp[i] == ')'){while (GetTop(&cstack) != '(' && !isEmpty(&cstack)){oper = GetTop(&cstack);Pop(&cstack);f2 = GetTop(&fstack);Pop(&fstack);f1 = GetTop(&fstack);Pop(&fstack);f = Calculate(f1, f2, oper);Push(&fstack, f);}Pop(&cstack);}}while (!isEmpty(&cstack)){oper = GetTop(&cstack);Pop(&cstack);f2 = GetTop(&fstack);Pop(&fstack);f1 = GetTop(&fstack);Pop(&fstack);f = Calculate(f1, f2, oper);Push(&fstack, f);}printf("\nThe result is:%f\n", GetTop(&fstack));Pop(&fstack);}。

C语言编写四则运算#include<stdio.h>//计算器#include<malloc.h>#define STACK_SIZE100//max size of the stack #define STACK_INCREMENT10//realloc size typedefstruct FStack//stack of int{float* base;float* top;int stacksize;}FStack;void Init(FStack* s){s->base = (float*)malloc(STACK_SIZE * sizeof(FStack));if (!s->base){printf("overflow!\n");return;}s->top = s->base;s->stacksize = STACK_SIZE;}bool isEmpty(FStack* s){if (s->top == s->base){returntrue;}else{returnfalse;}}void Push(FStack* s, float e){if (s->top - s->base >= s->stacksize) {printf("stack is full!\nrealloc %d\n", STACK_INCREMENT);s->base = (float*)realloc(s->base, (s->stacksize + sizeof(FStack)));if (!s->base){printf("overflow!\n");return;}s->top = s->base + s->stacksize;s->stacksize += STACK_INCREMENT;}*(s->top) = e;(s->top)++;}float GetTop(FStack* s){if (s->top == s->base){printf("stack is empty!\n");return 0;}float e = *(s->top - 1);return e;}void Pop(FStack* s){if (s->top == s->base){printf("stack is empty!\n");return;}s->top--;}typedefstruct CStack//stack of char {char* base;char* top;int stacksize;}CStack;void Init(CStack* s){s->base = (char*)malloc(STACK_SIZE * sizeof(CStack));if (!s->base){printf("overflow!\n"); return;}s->top = s->base;s->stacksize = STACK_SIZE; }bool isEmpty(CStack* s) {if (s->top == s->base){returntrue;}else{returnfalse;}}void Push(CStack* s, int e) {if (s->top - s->base >= s->stacksize){printf("stack is full!\nrealloc %d\n",STACK_INCREMENT);s->base = (char*)realloc(s->base, (s->stacksize + sizeof(CStack)));if (!s->base){printf("overflow!\n");return;}s->top = s->base + s->stacksize;s->stacksize += STACK_INCREMENT;}*(s->top) = e;(s->top)++;}char GetTop(CStack* s){if (s->top == s->base){printf("stack is empty!\n");return 0;}char e = *(s->top - 1);return e;}void Pop(CStack* s){if (s->top == s->base){printf("stack is empty!\n");return;}s->top--;}bool isOper(char ch){if (ch == '+' || ch == '-' || ch == '*' || ch == '/' || ch == '%'){returntrue;}else{returnfalse;}}int Priority(char ch) {int p;switch(ch){case'(':p = 0;break;case'+':case'-':p = 1;break;case'*':case'/':case'%':p = 2;break;}return p;}float Calculate(float f1, float f2, char oper) {float f3;switch(oper){case'+':f3 = f1 + f2;break;case'-':f3 = f1 - f2;break;case'*':f3 = f1 * f2;break;case'%':f3 = (float)((int)f1 % (int)f2);break;case'/':if (f2 == 0){printf("\nDevided by zero!"); exit(1);}else{f3 = f1 / f2;}break;}return f3;}float StrtoFloat(char* str, int* pos) {float fRes;int i = *pos;int k;char n[50];for (k = 0; str[i] >= '0' && str[i] <= '9' || str[i] == '.'; i++, k++){n[k] = str[i];}n[k] = '\0';*pos = i;fRes = atof(n);return fRes;}bool Check(char* str){int i = 0;while (str[i] != '\0'){if (str[i] != '+' && str[i] != '-' && str[i] != '*' &&str[i] != '/' && str[i] != '%' && str[i] != '.' && str[i] != '(' && str[i] != ')' && (str[i] < '0' || str[i] > '9')){returnfalse;}i++;}returntrue;}void main(){char exp[100];int i;float f, f1, f2;char oper;FStackfstack; CStackcstack;Init(&fstack);Init(&cstack);printf("The expression is:");gets(exp);if (!Check(exp)){printf("input error! exit now!\n"); exit(1);}for (i = 0; exp[i] != '\0' && exp[i] != -52; i++){if (!isOper(exp[i])){f = StrtoFloat(exp, &i);Push(&fstack, f);}if (isOper(exp[i])){if (!isEmpty(&cstack)){while (!isEmpty(&cstack) && Priority(exp[i]) <= Priority(GetTop(&cstack))){oper = GetTop(&cstack);Pop(&cstack);f2 = GetTop(&fstack);Pop(&fstack);f1 = GetTop(&fstack);Pop(&fstack);f = Calculate(f1, f2, oper);Push(&fstack, f);}Push(&cstack, exp[i]);}else{Push(&cstack, exp[i]);}}elseif (exp[i] == '('){Push(&cstack, exp[i]);}elseif (exp[i] == ')'){while (GetTop(&cstack) != '(' && !isEmpty(&cstack)){oper = GetTop(&cstack); Pop(&cstack);f2 = GetTop(&fstack);Pop(&fstack);f1 = GetTop(&fstack);Pop(&fstack);f = Calculate(f1, f2, oper);Push(&fstack, f);}Pop(&cstack);}}while (!isEmpty(&cstack)){oper = GetTop(&cstack);Pop(&cstack);f2 = GetTop(&fstack);Pop(&fstack);f1 = GetTop(&fstack);Pop(&fstack);f = Calculate(f1, f2, oper);Push(&fstack, f);}printf("\nThe result is:%f\n", GetTop(&fstack));Pop(&fstack); }。