switch可选择操作四则运算!c语言。_donaldfrist的博客-爱代码爱编程
#include<stdio.h>
int main() {
double a,b;
char op;
printf("输入两个数字:");
scanf("%lf%lf",&a,&b);
for(int i=1; i<=5; i++) {
printf("请选择操作:");
getchar();
scanf("%c",&op);
if(op==' ')
break;
switch(op) {
case'+':
printf("=%.2lf\n",a+b);
break;
case'-':
printf("=%.2lf\n",a-b);
break;
case'*':
printf("=%.2lf\n",a*b);
break;
case'/':
printf("=%.2lf\n",a/b);
break;
default:
printf("error\n");
break;
}
}
printf("Thank!");
return 0;
}