C + + window design Practice Project 2 person Income tax Calculator

2, the preparation of multi-branch selection structure program, enter the total monthly income, calculated his monthly tax and after-tax income.

Income Tax calculation method: from . years 9 Month 1 since the beginning of the day, our country adjusts the personal income tax levy point. The base is raised to 3500 , and the excess is calculated at the following 7 levels.

Serial number	Income Range	Rate	Calculator Deduction Number
1	more than 0 to the	3%	0
2	more than 1500 4500	10%	105
3	more than 4500 9000	20%	555
4	more than 9,000 35,000	25%	Span style= "FONT-SIZE:24PX; Color:black ">1005
5	more than 35,000 55,000	30%	Span style= "FONT-SIZE:24PX; Color:black ">2755
6	more than 55,000 Yuan to 80,000 part of the meta	35%	5505
7	more than 80,000 above	45%	13505

Personal Income Tax calculation method: personal income tax = Taxable Income amount * Tax rate - calculator Deductions, of which: Taxable Income amount = Total revenue - Non-taxable income - Tax Exempt income - each deduction.

tax-exempt income and deductions are ignored, non-taxable income is the starting point base 3500 personal income tax = ( Total revenue -3500) * Tax rate - Calculator deduction number

For example: Wang's total monthly income 3600 yuan, personal income tax = ( 3600-3500 ) *3%=3 Yuan, Li a month income 13500 yuan, personal income tax = ( 13500-3500 ) *25%-1005=2500-1005=1495 Yuan.

The crux of the matter is how to determine the tax rate and calculator deduction based on the amount of taxable income.

To complete the running interface:

Each control is associated with a variable:

Master Run code:

<span style= "FONT-SIZE:24PX;" > void Cmydlg::onbutton1 () {//Todo:add your control notification handler code here    UpdateData ();    Double P;if (m_m<1500)    {        m_n=0;       p=0.03;    }    else if (m_m<4500)    {        m_n=105;        p=0.1;    }    else if (m_m<9000)    {        m_n=555;        p=0.20;    }    else if (m_m<35000)    {        m_n=1005;        p=0.25;    }    else if (m_m<55000)    {        m_n=2755;        p=0.30;    }    else if (m_m<80000)    {        m_n=5505;        p=0.35;    }    else    {        m_n=13505;        p=0.45;    } m_k=m_m* (1-p)-m_n; UpdateData (FALSE);             </span>

Finally understand what is the matter.

C + + window design Practice Project 2 person Income tax Calculator