switch的应用

#include<stdio.h>
int main()
{
    char b;
    int a,c;

    scanf("%d%c%d",&a,&b,&c);
    switch(b)
    {
        case '+':printf("%d",a+c);
                 break;
        case '-':printf("%d",a-c);
                 break;
        case '*':printf("%d",a*c);
                 break;
        case '/':printf("%d",a/c);
                 break;
    }
    return 0;
}