四则运算

引用自网站https://zhidao.baidu.com/question/1240273535345551459.html

代码：

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
int n, n1;
char fun(int op){ if (op == 0)return '+'; else if (op == 1)return '*'; else if (op == 2)return '-'; else return '/'; }
int Compute(int a, int b, int op)
{
int p;
if (op == 0)p = a + b; else if (op == 1)p = a*b; else if (op == 2)p = a - b; else p = a / b;
if (n == p){
n1++;
return 1;
}
else
return 0;
}
void Print(int flag)
{
if (flag == 1)printf("Right! ");
else
printf("Not correct! ");
}
void main()
{
srand((unsigned)time(NULL));
int a, b, op, i = 0, num;
while (true)
{
if (i == 10)break;
a = rand() % 10 + 1;
b = rand() % 10 + 1;
op = rand() % 4;
if (a%b == 0 && a >= b)
{
i++;
printf("%d%c%d=", a, fun(op), b);
scanf_s("%d", &n);
num = Compute(a, b, op);
Print(num);
}
}
printf("you grade is:%d,you falsed %d! ", n1 * 10, 10 - n1);
}

实现功能：由系统给出简单的四则运算题目，然后使用者对其进行运算后输入结果。