作业课后题不太懂大佬能看看吗 - 编程论坛

rjsp2022-11-06 22:06

大体框架如下（数字可能有错，没检查过）（“使用fgets和atoi”则不知所云）

程序代码：

#include <stdio.h>

int main( void )
{
    int income;
    if( scanf("%d",&income) != 1 )
    {
        puts( "输入非整型" );
        return 1;
    }

    if( income < 0 )
    {
        puts( "收入为负" );
        return 0;
    }

    const char* group;
    double tax;
    if( income <= 20000 )
    {
        group = "Low";
        tax = 0;
    }
    else if( income <= 100000 )
    {
        group = "Lower-middle";
        tax = (income-20000)*0.1;
    }
    else if( income <= 200000 )
    {
        group = "Upper-middle";
        tax = (100000-20000)*0.1 + (income-100000)*0.2;
    }
    else
    {
        group = "High";
        tax = (100000-20000)*0.1 + (200000-100000)*0.2 + (income-200000)*0.3;
    }
    printf( "Income group: %s\n", group );
    printf( "Income tax: %.2f\n", tax );
}