Using x++ code calculate the personal tax of salary

The following X++ code using calculate the personal tax of salary.

wrote by Jimmy on March 21th 2011

static void Jimmy_CalcPersonalIncomeTax2011(Args _args)
{
    Dialog      Dialog      = new Dialog("计算个人所得税[2011-9开始实施]");
    DialogField dlgSalerly  = Dialog.addField(typeid(Amount),"工资收入","工资收入");
    DialogField dlgTaxStar  = Dialog.addField(typeid(Amount),"个税起征点","个税起征额");
    DialogField dlgHoursePer= Dialog.addField(typeid(Percent),"住房公积金比例","住房公积金比例..");
    DialogField dlgSocialIn = Dialog.addField(typeid(Amount),"医保社保","各项医保社保");
    DialogField dlgNew2011  = Dialog.addField(typeid(Noyes),"新个税算法","2011年09月开始实施");

    Amount                  SalaryIncome,SocialAmount,TaxStart;
    Amount                  taxBefored,taxAfter,HoursePer,HourseAmount,Others;
    Noyes                   New2011;
    Amount                  Taxed;

Amount CalcTaxNew(Amount     _taxBefore) //2011年9月份起，个税按3500元/月的起征标准算
{
    Amount  tax;
;
    if(_taxBefore > 0        && _taxBefore <= 1500) // 1
        tax = _taxBefore * 0.03 - 0;
    if(_taxBefore > 1500     && _taxBefore <= 4500) // 2
        tax = _taxBefore * 0.10 - 105;
    if(_taxBefore > 4500     && _taxBefore <= 9000) // 3
        tax = _taxBefore * 0.20 - 555;
    if(_taxBefore > 9000     && _taxBefore <= 35000)// 4
        tax = _taxBefore * 0.25 - 1005;
    if(_taxBefore > 35000    && _taxBefore <= 55000)// 5
        tax = _taxBefore * 0.30 - 2755;
    if(_taxBefore > 55000    && _taxBefore <= 80000)// 6
        tax = _taxBefore * 0.35 - 5505;
    if(_taxBefore > 80000)                         // 7
        tax = _taxBefore * 0.45 - 13505;
    return tax;
    //个人所得税 = 需缴税工资 * 税率 - 速算扣除数
}
Amount CalcTax(Amount     _taxBefore) // 2008年3月份起，个税按2000元/月的起征标准算
{
    Amount  tax;
;
    if(_taxBefore > 0        && _taxBefore <= 500)
        tax = _taxBefore * 0.05 - 0;
    if(_taxBefore > 500      && _taxBefore <= 2000)
        tax = _taxBefore * 0.10 - 25;
    if(_taxBefore > 2000     && _taxBefore <= 5000)
        tax = _taxBefore * 0.15 - 125;
    if(_taxBefore > 5000     && _taxBefore <= 20000)
        tax = _taxBefore * 0.20 - 375;
    if(_taxBefore > 20000    && _taxBefore <= 40000)
        tax = _taxBefore * 0.25 - 1375;
    if(_taxBefore > 40000    && _taxBefore <= 60000)
        tax = _taxBefore * 0.30 - 3375;
    if(_taxBefore > 60000    && _taxBefore <= 80000)
        tax = _taxBefore * 0.35 - 6375;
    if(_taxBefore > 80000    && _taxBefore <= 100000)
        tax = _taxBefore * 0.40 - 10375;
    if(_taxBefore > 100000)
        tax = _taxBefore * 0.45 - 15375;
    return tax;
    //个人所得税 = 需缴税工资 * 税率 - 速算扣除数
}
;
    Dialog.doInit();
    dlgNew2011.value(Noyes::Yes);

    dlgSalerly.value(20000);
    dlgTaxStar.value(3500);
    dlgHoursePer.value(12);
    dlgSocialIn.value(102);//102 + (5500 * 5.00%) = 377
    if(!Dialog.run())
        return;
        
    New2011         = dlgNew2011.value();
    SalaryIncome    = dlgSalerly.value();
    TaxStart        = dlgTaxStar.value();
    HoursePer       = dlgHoursePer.value();
    SocialAmount    = dlgSocialIn.value();

    if(New2011 && TaxStart != 3500)
        throw Error("请输入新个税起征点 [3500]");

    if(!New2011 && TaxStart != 2000)
        throw Error("请输入个税起征点 [2000]");

    HourseAmount    = SalaryIncome * (HoursePer / 100);
    Others          = SocialAmount + HourseAmount;

    taxBefored      = SalaryIncome - (Others + TaxStart);
    //需缴税的工资部分 = 工资收入 - (其他非含税 + 个税起征额)

    if(TaxStart <= 0)
        Taxed = 0;
    else
    {
        if(New2011)
            Taxed = CalcTaxNew(taxBefored);
        else
            Taxed = CalcTax(taxBefored);
    }
    taxAfter = SalaryIncome - (Others + Taxed);//税后工资 = 工资收入 - (其他非含税 + 个人所得税)


    box::info(strfmt("%1[%2]\n%3[%4]\n%5[%6]\n%7[%8]\n\n%9[%10]\n\n%11",
                      "工资收入",     num2str(SalaryIncome,1,2,1,1),
                      "个人所得税",   num2str(Taxed,1,2,1,1),
                      "住房公积金",   num2str(HourseAmount,1,2,1,2),
                      "总扣金额",     num2str(Others + Taxed,1,2,1,1),
                      "实际工资",     num2str(taxAfter,1,2,1,1),
                      
                      global::numeralsToTxt_CN(taxAfter,false,true,strlen(num2str(taxAfter,1,2,1,1)))),
                      "纳税光荣!");
}