UGL打印一下劳务个税

预扣预缴应纳税所得额 = 劳务报酬(少于4000元) - 800元
预扣预缴应纳税所得额 = 劳务报酬(超过4000元) * 80%
应纳税额 = 应纳税所得额 × 适用税率 - 速算扣除数

应纳税所得额(含税)          税率(%) 速算扣除数
不超过20,000元的部分          20        0
超过20,000元到50,000元的部分   30    2,000
超过50,000元的部分            40    7,000

/*
 * 版权所有  公众号  VxWorks567
 */

/* 劳务所得, 个税预扣预缴 */

#include <stdio.h>
#include <ugl/ugl.h>

/* 应纳税所得额 */
#define EXEMPTION        800
#define THRESHOLD       4000
#define PAYABLES        8/10

/* 税率 */
#define TAX_RATE1       2/10
#define TAX_THRESHOLD1 20000
#define TAX_RATE2       3/10
#define DEDUCTION1      2000
#define TAX_THRESHOLD2 50000
#define TAX_RATE3       4/10
#define DEDUCTION2      7000

/* 坐标 */
#define X1                10
#define Y1               760
#define X2              1020
#define Y2                10
#define STEP             100
#define MULTIPLICATION     5
#define TOTAL         (X2-X1)

UINT32 afterTax(UINT32 income)
{
    UINT32 taxable;
    UINT32 tax;

    /* 劳务报酬少于800元时, 应纳税所得额 = 0 */
    if(income <= EXEMPTION)
        {
        taxable = 0.0;
        }
    /* 劳务报酬少于4000元时, 应纳税所得额 = 劳务报酬 - 800元 */
    else if(income <= THRESHOLD)
        {
        taxable = income - EXEMPTION;
        }
    /* 劳务报酬超过4000元时, 应纳税所得额 = 劳务报酬 * 80% */
    else
        {
        taxable = income * PAYABLES;
        }

    /* 应纳税额 = 应纳税所得额 * 适用税率 - 速算扣除数 */

    /* 应纳税所得额不超过20000元时, 税率为20%, 速算扣除数为0 */
    if(taxable < TAX_THRESHOLD1)
        {
        tax = taxable * TAX_RATE1;
        }
    /* 应纳税所得额超过20000元而不足50000元时, 税率为30%, 速算扣除数为2000 */
    else if(taxable < TAX_THRESHOLD2)
        {
        tax = taxable * TAX_RATE2 - DEDUCTION1;
        }
    /* 应纳税所得额超过50000元时, 税率为40%, 速算扣除数为7000 */
    else
        {
        tax = taxable * TAX_RATE3 - DEDUCTION2;
        }
    return income - tax;
    }

void uglTax
    (
    UINT32 multi,   /* 收入增幅为100的倍数 */
    UINT32 printOut /* 是否打印个税金额 */
    )
{
    UGL_REG_DATA *pRegData;
    UGL_GC_ID     gc;

    UINT32 income = 0;
    UINT32 gain;
    UINT32 span;
    UINT32 num;

    uglDisplayOpen(0, 0, 0); 
    pRegData = uglRegistryFind(UGL_DISPLAY_TYPE, 0, 0, 0);
    gc = uglGcCreate((UGL_DEVICE_ID)pRegData->id);

    /* 坐标系 */
    uglForegroundColorSet(gc, 0xffffff);
    uglLine(gc, X1, Y1, X2, Y1);
    uglLine(gc, X1, Y1, X1, Y2);

    if(multi < 1)
        {
        multi = MULTIPLICATION;
        }
    for(num=1; num<TOTAL; num++)
        {
        income += STEP*multi;
        gain = afterTax(income);
        span = num*gain/income;
        uglPixelSet(gc, X1+num, Y1-num, 0xff00);
        uglPixelSet(gc, X1+num, Y1-(UINT32)span, 0xff0000);
        if(printOut != 0)
            {
            printf(" gain(%u)/income(%u) = %.2f%\n",
                gain, income, 100.0*gain/income);
            }
        }
#if 0
    uglGcDestroy(gc);
    uglDisplayClose(0);
#endif
    return;
    }