c++ - Write a personal income tax calculation program, how to echo it?

Question

• Write a personal income tax calculation program

• The calculation method is: 1. No tax for 5,000; 2. 5,000-15,000: 10%; 3. 15,000-35,000: 15%; above 35,000, 20%;

• For example, the user salary is 38,000, the calculation method is 50000.0 100000.10 200000.15 30000.20;

#include <iostream>
using namespace std;
double shuishou(double); //函数原型
double basePay;   //税前工资
const double fir_income_tax = 0.10; //第一档所得税率
const double sec_income_tax = 0.15;//第二档所得税率
const double tr_income_tax = 0.20;//第三档所得税率
const int base = 5000; //开始计算所得税下限
const int sec = 15000;    //所得税第二档计算上限
const int tre = 35000; //所得税最高档计算下限
double income_tax;    //实际所得税

int main()
{
    cout << "请输入您的工资\n";
    while (cin >> basePay) //判断用户输入是否有效
    {
        if (basePay == 0 || basePay < 0) //如果用户输入0或小于零程序退出
            break;
        else
        {
            double show;
            show = shuishou(basePay);
            cout << "您应交个人所得税为："<<show << "元\n";
            cout << "请输入您的工资！\n";
            cin >> basePay;
        }

    }
    return 0;
}

double shuishou(double basePay)
{
    if (basePay <= base) //如果用户工资小于等于5000，则不交所得税
        return 0;
    else if (basePay > base&&basePay < sec)
    {
        //用户工资进入第一档税收计算范围
        income_tax = (basePay - base)*fir_income_tax; 
        return income_tax;
    } 
    else if (basePay > sec&&basePay < tre)
    {
        //用户工资进入第二档税收计算范围
        income_tax = (basePay - sec)*sec_income_tax + (sec - base)*0.10;
        return income_tax;
    }
    else if (basePay > tre)
    {
        //用户工资进第三档税收计算范围
        income_tax = (basePay - tre)*tr_income_tax + (tre - sec)*0.15 + (sec - base)*0.10;
        return income_tax;
    }
    return 0;
}

The above is the program I wrote. The problem with this program is that after displaying the income tax payable, you must hit Enter the next time you enter. How can I use cin to input content and press Enter to echo, instead of first Do you have to type again before the response is displayed?

Answer 1

Remove cin >> basePay;.

#include <iostream>
using namespace std;
double shuishou(double); //函数原型
double basePay;   //税前工资
const double fir_income_tax = 0.10; //第一档所得税率
const double sec_income_tax = 0.15;//第二档所得税率
const double tr_income_tax = 0.20;//第三档所得税率
const int base = 5000; //开始计算所得税下限
const int sec = 15000;    //所得税第二档计算上限
const int tre = 35000; //所得税最高档计算下限
double income_tax;    //实际所得税

int main()
{
    cout << "请输入您的工资\n";
    while (cin >> basePay) //判断用户输入是否有效
    {
        if (basePay == 0 || basePay < 0) //如果用户输入0或小于零程序退出
            break;
        else
        {
            double show;
            show = shuishou(basePay);
            cout << "您应交个人所得税为："<<show << "元\n";
            cout << "请输入您的工资！\n";
            cin >> basePay;
        }

    }
    return 0;
}

double shuishou(double basePay)
{
    if (basePay <= base) //如果用户工资小于等于5000，则不交所得税
        return 0;
    else if (basePay > base&&basePay < sec)
    {
        //用户工资进入第一档税收计算范围
        income_tax = (basePay - base)*fir_income_tax; 
        return income_tax;
    } 
    else if (basePay > sec&&basePay < tre)
    {
        //用户工资进入第二档税收计算范围
        income_tax = (basePay - sec)*sec_income_tax + (sec - base)*0.10;
        return income_tax;
    }
    else if (basePay > tre)
    {
        //用户工资进第三档税收计算范围
        income_tax = (basePay - tre)*tr_income_tax + (tre - sec)*0.15 + (sec - base)*0.10;
        return income_tax;
    }
    return 0;
}

Answer 2

Thank you very much! I'll try