个人所得税

#include <stdio.h>
#include <stdlib.h>

int main()
{
    double dSalary,dTax=0,dNetIncome=0;
    printf("请输入您本月的收入总额（元）\n");
    scanf("%lf",&dSalary);
    dSalary=dSalary-3500;
    if(dSalary>0&&dSalary<=1500)
        dTax=(dSalary)*0.03;
        else if(dSalary>1500&&dSalary<=4500)
        dTax=(dSalary)*0.1-105;
        else if(dSalary>4500&&dSalary<=9000)
        dTax=(dSalary)*0.2-555;
        else if(dSalary>9000&&dSalary<=35000)
        dTax=(dSalary)*0.25-1005;
        else if(dSalary>35000&&dSalary<=55000)
        dTax=(dSalary)*0.3-2755;
        else if(dSalary>55000&&dSalary<=80000)
        dTax=(dSalary)*0.35-5505;
        else
        dTax=(dSalary)*0.45-13505;
    dNetIncome=dSalary-dTax+3500;
    printf("您本月应交个人所得税%.2lf元，税后收入是%.2lf元。\n",dTax,dNetIncome);
    return 0;
}

 

不太清楚，但这个应该是最基本的做法吧？感觉还可以想办法提速一下，或者说是不用让他在每一个if那都判断一次，比如大于80000的可以从倒数第一个if开始。恩……