求大神给注释，谢了啊

[abc583]

#define _CRT_SECURE_NO_WARNINGS

#include <windows.h>

#include <math.h>

#include <time.h>

#pragma comment(lib, "user32.lib")

#pragma comment(lib, "gdi32.lib")

#pragma comment(linker, "/SUBSYSTEM:Windows")



void GetPos(double degree, int len, int* x, int* y)

{

*x = len * sin(degree);

*y = len * cos(degree);

}



void DrawClock(HWND hw, HDC h, int hour, int minute, int second)

{

HDC bufdc = CreateCompatibleDC(h);

HBITMAP buf = CreateCompatibleBitmap(bufdc, 200, 200);

RECT cr;

HBRUSH bBg = CreateSolidBrush(RGB(255, 255, 255));

GetClientRect(hw, &cr);

SelectObject(bufdc, bBg);

SelectObject(bufdc, buf);

FillRect(bufdc, &cr, bBg);



{

int sx, sy, ex, ey;

int i;

for(i = 0; i < 12; ++i) {

GetPos(2*3.14159/12*i, 85, &sx, &sy);

GetPos(2*3.14159/12*i, 95, &ex, &ey);

MoveToEx(bufdc, 100+sx, 100-sy, 0);

LineTo(bufdc, 100+ex, 100-ey);

}

}



{

int hx, hy, mx, my, sx, sy;

GetPos(2*3.14159 / 12 * (hour + (double)minute / 60 + (double)second / 3600), 50, &hx, &hy);

GetPos(2*3.14159 / 60 * (minute + (double)second / 60), 65, &mx, &my);

GetPos(2*3.14159 / 60 * second, 80, &sx, &sy);

MoveToEx(bufdc, 100, 100, NULL);

LineTo(bufdc, 100+hx, 100-hy);

MoveToEx(bufdc, 100, 100, NULL);

LineTo(bufdc, 100+mx, 100-my);

MoveToEx(bufdc, 100, 100, NULL);

LineTo(bufdc, 100+sx, 100-sy);

}



BitBlt(h, 0, 0, 200, 200, bufdc, 0, 0, SRCCOPY);

DeleteDC(bufdc);

DeleteObject(bBg);

DeleteObject(buf);

}



LRESULT CALLBACK WndProc(HWND h, UINT m, WPARAM w, LPARAM l)

{

switch(m) {

case WM_CREATE:

SetTimer(h, 1, 1000, 0);

return 0;

case WM_ERASEBKGND:

return 1;

case WM_TIMER:

InvalidateRect(h, 0, FALSE);

return 0;

case WM_PAINT: {

PAINTSTRUCT ps;

HDC dc = BeginPaint(h, &ps);

{

time_t t;

struct tm* pst;

time(&t);

pst = localtime(&t);

DrawClock(h, dc, pst->tm_hour, pst->tm_min, pst->tm_sec);

}

EndPaint(h, &ps);

return 0;

}

case WM_DESTROY:

KillTimer(h, 1);

PostQuitMessage(0);

return 0;

default:

return DefWindowProc(h, m, w, l);

}

}



int APIENTRY WinMain(HINSTANCE hInst, HINSTANCE hPrev, LPSTR szCmd, INT nShow)

{

WNDCLASS wc;

ZeroMemory(&wc, sizeof(wc));

wc.style = CS_HREDRAW | CS_VREDRAW;

wc.lpfnWndProc = WndProc;

wc.hInstance = hInst;

wc.hbrBackground = (HBRUSH) COLOR_WINDOW;

wc.lpszClassName = TEXT("MYCLOCK");



if (RegisterClass(&wc) != 0) {

MSG m;

HWND hw = CreateWindow(TEXT("MYCLOCK"), TEXT("Clock"), WS_OVERLAPPEDWINDOW,

CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, hInst, 0);



if (hw != NULL) {

RECT r;

GetWindowRect(hw, &r);

r.right = r.left + 200;

r.bottom = r.top + 200;

AdjustWindowRect(&r, WS_OVERLAPPEDWINDOW, FALSE);

MoveWindow(hw, r.left, r.top, r.right - r.left, r.bottom - r.top, FALSE);

ShowWindow(hw, SW_SHOWNORMAL);

UpdateWindow(hw);



while( GetMessage(&m, 0, 0, 0) > 0) {

TranslateMessage(&m);

DispatchMessage(&m);

}

return 0;

}

return 1;

} else

return 1;
}

[测试NULL]

[vipcxj]

#define _CRT_SECURE_NO_WARNINGS 

#include <windows.h> 

#include <math.h> 

#include <time.h> 

#pragma comment(lib, "user32.lib") 

#pragma comment(lib, "gdi32.lib") 

#pragma comment(linker, "/SUBSYSTEM:Windows") 

  
//说白了就是极坐标转普通坐标，不过x，y和数学里面的反一反，反正LZ你知道是通过角度和长度，得到相应x，y就行了
void GetPos(double degree, int len, int* x, int* y) 

{ 

    *x = len * sin(degree); 

    *y = len * cos(degree); 

} 

  
//画钟 
void DrawClock(HWND hw, HDC h, int hour, int minute, int second) 

{ 

    HDC bufdc = CreateCompatibleDC(h);  //设备，图就画在这东西上面

    HBITMAP buf = CreateCompatibleBitmap(bufdc, 200, 200); //位图

    RECT cr; //框

    HBRUSH bBg = CreateSolidBrush(RGB(255, 255, 255)); //背景画刷，纯白的

    GetClientRect(hw, &cr); //取得client area的框，或者说范围

    SelectObject(bufdc, bBg); //为你的设备选择一个画刷，这里用来画背景

    SelectObject(bufdc, buf); //为你的设备选择一个位图

    FillRect(bufdc, &cr, bBg); //现在背景画刷填充整个client area，这就算把背景弄成白的了

  

    { 

        int sx, sy, ex, ey; 

        int i; 

        for(i = 0; i < 12; ++i) {  //开始画时钟十二个时刻的刻度

            GetPos(2*3.14159/12*i, 85, &sx, &sy); //第一个参数是角度，用的是弧度制，其实就是2*Pi/i，第二个是长度，这里长度是85，所以是刻度的起始点

            GetPos(2*3.14159/12*i, 95, &ex, &ey); //同上，这里长度90，所以是刻度的终点

            MoveToEx(bufdc, 100+sx, 100-sy, 0); //设置起点，注意之前的起点终点是相对于圆心（0，0）的，但这里设置圆心为（100，100）

            LineTo(bufdc, 100+ex, 100-ey); //同上，从起点到终点画条线，这就算刻度了

        } 

    } 

  
    //这里开始画时钟的指针
    { 

        int hx, hy, mx, my, sx, sy; //显然这些分别是时钟的时针，分针，秒针的终点，相对于圆心（0，0）的 

        GetPos(2*3.14159 / 12 * (hour + (double)minute / 60 + (double)second / 3600), 50, &hx, &hy); //这里除以12说明时针走12下绕一圈，反正第一个参数就是根据当前时刻算角度啦，反正最后得到时针的坐标

        GetPos(2*3.14159 / 60 * (minute + (double)second / 60), 65, &mx, &my); //这里是分针的坐标

        GetPos(2*3.14159 / 60 * second, 80, &sx, &sy); //这里是秒针的坐标

        MoveToEx(bufdc, 100, 100, NULL); //和上面刻度一样，以(100,100)为圆心，转换坐标后画线，这是起点

        LineTo(bufdc, 100+hx, 100-hy); //终点

        MoveToEx(bufdc, 100, 100, NULL);  //同上

        LineTo(bufdc, 100+mx, 100-my);   //同上

        MoveToEx(bufdc, 100, 100, NULL);   //同上

        LineTo(bufdc, 100+sx, 100-sy);   //同上

    } 

      

    BitBlt(h, 0, 0, 200, 200, bufdc, 0, 0, SRCCOPY); 刚刚画的东西都在bufdc上，其实都还在内存里，并没真的画出来，这里正式将它贴到设备上，这里贴的是个宽200，长200，左上角坐标是(0,0)的正方形区域。

    DeleteDC(bufdc); //既然贴完了，这个自然就木有用了，删之 

    DeleteObject(bBg); //同上

    DeleteObject(buf); //同上

} 

  

LRESULT CALLBACK WndProc(HWND h, UINT m, WPARAM w, LPARAM l) 

{ 

    switch(m) { 

        case WM_CREATE: //启动时

            SetTimer(h, 1, 1000, 0); //设置定时器

            return 0; 

        case WM_ERASEBKGND: 

            return 1; 

        case WM_TIMER: //触发定时器

            InvalidateRect(h, 0, FALSE); //强制重画

            return 0; 

        case WM_PAINT: { //这里开始重画

            PAINTSTRUCT ps; 

            HDC dc = BeginPaint(h, &ps); //开始画鸟 

            { 

                time_t t; 

                struct tm* pst; 

                time(&t); //得到当前世界

                pst = localtime(&t); 

                DrawClock(h, dc, pst->tm_hour, pst->tm_min, pst->tm_sec); //画钟

            } 

            EndPaint(h, &ps); //画完收工

            return 0; 

        } 

        case WM_DESTROY: //窗口销毁时

            KillTimer(h, 1); //删除定时器

            PostQuitMessage(0); 

            return 0; 

        default: 

            return DefWindowProc(h, m, w, l); 

    } 

} 

  
//这东西是要windows编程都一样就不注释了
int APIENTRY WinMain(HINSTANCE hInst, HINSTANCE hPrev, LPSTR szCmd, INT nShow) 

{ 

    WNDCLASS wc; 

    ZeroMemory(&wc, sizeof(wc)); 

    wc.style = CS_HREDRAW | CS_VREDRAW; 

    wc.lpfnWndProc = WndProc; 

    wc.hInstance = hInst; 

    wc.hbrBackground = (HBRUSH) COLOR_WINDOW; 

    wc.lpszClassName = TEXT("MYCLOCK"); 

      

    if (RegisterClass(&wc) != 0) { 

        MSG m; 

        HWND hw = CreateWindow(TEXT("MYCLOCK"), TEXT("Clock"), WS_OVERLAPPEDWINDOW, 

            CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, hInst, 0); 

          

        if (hw != NULL) { 

            RECT r; 

            GetWindowRect(hw, &r); 

            r.right = r.left + 200; 

            r.bottom = r.top + 200; 

            AdjustWindowRect(&r, WS_OVERLAPPEDWINDOW, FALSE); 

            MoveWindow(hw, r.left, r.top, r.right - r.left, r.bottom - r.top, FALSE); 

            ShowWindow(hw, SW_SHOWNORMAL); 

            UpdateWindow(hw); 

          

            while( GetMessage(&m, 0, 0, 0) > 0) { 

                TranslateMessage(&m); 

                DispatchMessage(&m); 

            } 

            return 0; 

        } 

        return 1; 

    } else 

        return 1;
}

我觉得我注释得够详细了，lz快给分吧~

[abc583]

怎么后面的没注释了，我是新手都不懂啊

[vipcxj]

引用 3 楼 u013249289 的回复:

怎么后面的没注释了，我是新手都不懂啊

因为后面你随便找本windows编程的书都有一模一样的东西，而且显然讲得比我好~~~

[abc583]

引用 4 楼 vipcxj 的回复:

[quote=引用 3 楼 u013249289 的回复:] 怎么后面的没注释了，我是新手都不懂啊

因为后面你随便找本windows编程的书都有一模一样的东西，而且显然讲得比我好~~~[/quote] 谢了