程式碼

C++

#include <iostream>
using namespace std;

class Tax
{
    public:
        double income_before_tax;
        double income_after_tax;
        float tax_rate;

    public:
        void display()
        {
            cout<<"income_after_tax:"
 
<<income_after_tax;
        }
};

int main(int argc, char** argv) {
    double T,real_income=0,result;
    float tax_rates[8]={0,0.03,0.1,0.2,0.25,0.3,0.35,0.45};
    double income_scope[8]={3500,1500,3000,4500,26000,20000,25000,100000};  
    cin>>T;
    //初始化稅務等級
    Tax taxs[8];
    //初始化最低無稅收入 
    taxs[0].income_before_tax=3500; 
    taxs[0].income_after_tax=3500; 
    taxs[0].tax_rate=0; 
     for(int i=1;i<8;i++)
     {
        //初始化稅率 
        taxs[i].tax_rate=tax_rates[i];
        //初始化範圍 
        //初始化稅前收入=上一階段+範圍 
        taxs[i].income_before_tax=taxs[i-1].income_before_tax+income_scope[i];
        //初始化稅後收入=上一階段稅後+範圍*（1-稅率） 
        taxs[i].income_after_tax=taxs[i-1].income_after_tax+income_scope[i]*(1-tax_rates[i]);
     }
     //計算稅收 
     for(int i=0;i<8;i++)
     {
        //大於稅後收入 
        if(T>taxs[i].income_after_tax)
            //至少擁有當前稅前收入 
            result=taxs[i].income_before_tax;
        else
        {
            //小於3500不上稅 
            if(T<=3500)
                result=T;
            else
            {
                //當前稅前收入+超出稅收部分 
                result+=(T-taxs[i-1].income_after_tax)/(1.0-taxs[i].tax_rate);
                break;  
            }

        }

     } 
     //輸出結果 
    cout<<result;
    return 0;
}