代码改变世界

例3-9

2013-10-03 20:51  Summer.xia  阅读(97)  评论(0)  编辑  收藏  举报 
#include<stdio.h>
int main(void)
{
    double value1,value2;
    char op;


    printf("Type in an expression:");
    scanf("%lf%c%lf",&value1,&op,&value2);
    switch(op){
    case'+':
        printf("=%.2f\n",value1+value2);
        break;
    case'-':
        printf("=%.2f\n",value1-value2);
        break;
    case'*':
        printf("=%.2f\n",value1*value2);
        break;    
    case'/':
        printf("=%.2f\n",value1/value2);
        break;
    default:
        printf("Unknown operator\n");
        break;
    }


    return 0;
}