简单练习计算器程序

#include <stdio.h>
int main()
{
    float factor1, factor2; //从键盘任意获取两个数
    double result;
    char operation; //从键盘上获取字符
    scanf("%f%c%f", &factor1, &operation, &factor2);
    if(operation == '+')
    {
        result = factor1 + factor2;
        printf("和是： %lf\n", result); //输出两个数的和，程序结束
    }
    else if(operation == '-')
    {
        result = factor1 - factor2;
        printf("差是： %lf\n", result); //输出两个数的差，程序结束
    }
    else if(operation == '*')
    {
        result = factor1 *factor2;
        printf("积是： %lf\n", result); //输出两个数的乘积，程序结束
    }
    else if(operation =='/')
    {
        if(factor2 == 0) //若除数为0 ，程序提示错误，程序结束
        {
            printf("亲 请您仔细输入operation\n");
            return 0;
        }
        result = factor1 / factor2;
        printf("商是： %lf\n", result); //输出两个数的商，程序结束
    }
    else
    {
        printf("somthing is error, your operation may wrong\n"); //若输入其他符号，程序提示错误，程序结束
        return 0;
    }
    printf("result is %lf\n",result); //输出结果
    return 0;
}