#include<stdio.h>
int main()
{
float a,b;
char c;
printf("请输入两个数和运算符并用空格隔开\n");
scanf("%f %f %c",&a,&b,&c);
switch(c)
{
case '+':printf("%.2f\n",(a+b));break;
case '-':printf("%.2f\n",(a-b));break;
case '*':printf("%.2f\n",(a*b));break;
case '/':printf("%.2f\n",(a/b));break;
}
return 0;
}
追问谢谢了