工资纳税系统
个人所得税每月交一次，底线是1600元/月，也就是超过了1600元的月薪才开始计收个人所得税。个人所得税税率表一（工资、薪金所得适用）
级数----------全月应纳税所得额----------税率（％）
1--------------不超过500元的--------------------------5
2----------超过500元至2000元的部分------------10
3----------超过2000元至5000元的部分----------15
4----------超过5000元至20000元的部分---------20
5----------超过20000元至40000元的部分-------25
6----------超过40000元至60000元的部分-------30
7----------超过60000元至80000元的部分-------35
8----------超过80000元至100000元的部分------40
9----------超过100000元的部分---------------------45
表中的应纳税所得额是指以每月收入额减除1600元后的余额。
例如：计算为：2500-1600=900
应纳个人所得税额=500×5%+400×10% =65
再比如：我们用一个大额工资计算，25000元
应纳税所得额=25000-1600=23400
应纳个人所得税税额
=500×5%+1500×10%+3000×15%+15000×20%+3400×25%=4475
要求：输入工资计算出纳税金额。

想干什么呢？

T版，最近大家都在实训。。。老师出的就是这类题目。。。

用if.else  最简单的数据结构就能弄出来

#include<stdio.h>
int main()
{
    float wage0,wage,tax;
    printf("月薪多少?\n");
    scanf("%f",&wage0);
    wage=wage0-1600;
    if(wage<=0)
        tax=0;
    else
        if(wage<=500)
        tax=wage*0.05;
        else
            if(wage<=2000)
            tax=25+(wage-500)*0.1;
            else
                if(wage<=5000)
                tax=175+(wage-2000)*0.15;
                else
                    if(wage<=20000)
                    tax=625+(wage-5000)*0.2;
                    else
                        if(wage<=40000)
                        tax=3625+(wage-20000)*0.25;
                        else
                            if(wage<=60000)
                            tax=8625+(wage-40000)*0.3;
                            else
                                if(wage<=80000)
                                tax=14625+(wage-60000)*0.35;
                                else
                                    if(wage<=100000)
                                    tax=21625+(wage-80000)*0.4;
                                    else
                                        if(wage>100000)
                                        tax=29625+(wage-100000)*0.45;
    printf("税：%f\n",tax);
    return 0;
}

我也想要？楼主能给我吗？我的邮箱是1179917630@

楼上正解
#include<stdio.h>
void main()
{
    float wage0,wage,tax;
    printf("月薪多少?\n");
    scanf("%f",&wage0);
    wage=wage0-1600;
    if(wage<=0)
        tax=0;
    else
        if(wage<=500)
        tax=wage*0.05;
        else
            if(wage<=2000)
            tax=500*0.05+(wage-500)*0.1;
            else
                if(wage<=5000)
                tax=500*0.05+1500*0.1+(wage-2000)*0.15;
                else
                    if(wage<=20000)
                    tax=500*0.05+1500*0.1+3000*0.15+(wage-5000)*0.2;
                    else
                        if(wage<=40000)
                        tax=500*0.05+1500*0.1+3000*0.15+15000*0.2+(wage-20000)*0.25;
                        else
                            if(wage<=60000)
                            tax=500*0.05+1500*0.1+3000*0.15+15000*0.2+20000*0.25+(wage-40000)*0.3;
                            else
                                if(wage<=80000)
                                tax=500*0.05+1500*0.1+3000*0.15+15000*0.2+20000*0.25+20000*0.3+(wage-60000)*0.35;
                                else
                                    if(wage<=100000)
                                    tax=500*0.05+1500*0.1+3000*0.15+15000*0.2+20000*0.25+20000*0.3+20000*0.35+(wage-80000)*0.4;
                                    else
                                        if(wage>100000)
                                        tax=500*0.05+1500*0.1+3000*0.15+15000*0.2+20000*0.25+20000*0.3+20000*0.35+20000*0.4+(wage-100000)*0.45;
    printf("税：%f\n",tax);
}

哥哥，你这是c语言的程序还是c++程序，<stdio.h>是什么意思啊???我是个超级萌新，完全不懂，跪求大哥哥指导啊