问题写成注释,在有问题的行后面
程序如下:#include<windows.h>LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow)
{
static TCHAR szAppName[] = TEXT("AltWind");
HWND hwnd;
MSG msg;
WNDCLASS wndclass; wndclass.style = CS_HREDRAW | CS_VREDRAW;
wndclass.lpfnWndProc = WndProc;
wndclass.cbClsExtra = 0;
wndclass.cbWndExtra = 0;
wndclass.hInstance = hInstance;
wndclass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
wndclass.lpszMenuName = NULL;
wndclass.lpszClassName = szAppName; if(!RegisterClass(&wndclass))
{
MessageBox(NULL, TEXT("Program requires Windows NT!"), szAppName, MB_ICONERROR);
return 0;
} hwnd = CreateWindow(szAppName, TEXT("Alternate and Winding Fil Modes"),
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT,
CW_USEDEFAULT, CW_USEDEFAULT,
NULL, NULL, hInstance, NULL); ShowWindow(hwnd, iCmdShow);
UpdateWindow(hwnd); while(GetMessage(&msg, NULL, 0, 0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return msg.wParam;
}LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
static POINT aptFigure[10] = {10, 70, 50, 70, 50, 10, 90, 10, 90, 50, 30, 50, 30, 90, 70, 90, 70, 30, 10, 30};//只定义了10个元素的数组,怎么会有20各元素呢?
static int cxClient, cyClient;
HDC hdc;
int i;
PAINTSTRUCT ps;
POINT apt[10]; switch(message)
{
case WM_SIZE:
cxClient = LOWORD(lParam);
cyClient = HIWORD(lParam);
return 0; case WM_PAINT:
hdc = BeginPaint(hwnd, &ps); SelectObject(hdc, GetStockObject(GRAY_BRUSH)); for(i =0; i<10; i++)
{
apt[i].x = cxClient * aptFigure[i].x/200;
//apt[i].x是怎么判断出来的,怎么知道这个数组中的那个元素是代表x祖的
apt[i].y = cyClient * aptFigure[i].y/100;
//这个也是一样的,怎么知道数组中的那些元素代表y组
} SetPolyFillMode(hdc, ALTERNATE);
Polygon(hdc, apt, 10); for(i =0; i<10; i++)
{
apt[i].x += cxClient/2;
} SetPolyFillMode(hdc, WINDING); Polygon(hdc, apt, 10); EndPaint(hwnd, &ps);
return 0; case WM_DESTROY:
PostQuitMessage(0);
return 0;
} return DefWindowProc(hwnd, message, wParam, lParam);
}
程序如下:#include<windows.h>LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow)
{
static TCHAR szAppName[] = TEXT("AltWind");
HWND hwnd;
MSG msg;
WNDCLASS wndclass; wndclass.style = CS_HREDRAW | CS_VREDRAW;
wndclass.lpfnWndProc = WndProc;
wndclass.cbClsExtra = 0;
wndclass.cbWndExtra = 0;
wndclass.hInstance = hInstance;
wndclass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
wndclass.lpszMenuName = NULL;
wndclass.lpszClassName = szAppName; if(!RegisterClass(&wndclass))
{
MessageBox(NULL, TEXT("Program requires Windows NT!"), szAppName, MB_ICONERROR);
return 0;
} hwnd = CreateWindow(szAppName, TEXT("Alternate and Winding Fil Modes"),
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT,
CW_USEDEFAULT, CW_USEDEFAULT,
NULL, NULL, hInstance, NULL); ShowWindow(hwnd, iCmdShow);
UpdateWindow(hwnd); while(GetMessage(&msg, NULL, 0, 0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return msg.wParam;
}LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
static POINT aptFigure[10] = {10, 70, 50, 70, 50, 10, 90, 10, 90, 50, 30, 50, 30, 90, 70, 90, 70, 30, 10, 30};//只定义了10个元素的数组,怎么会有20各元素呢?
static int cxClient, cyClient;
HDC hdc;
int i;
PAINTSTRUCT ps;
POINT apt[10]; switch(message)
{
case WM_SIZE:
cxClient = LOWORD(lParam);
cyClient = HIWORD(lParam);
return 0; case WM_PAINT:
hdc = BeginPaint(hwnd, &ps); SelectObject(hdc, GetStockObject(GRAY_BRUSH)); for(i =0; i<10; i++)
{
apt[i].x = cxClient * aptFigure[i].x/200;
//apt[i].x是怎么判断出来的,怎么知道这个数组中的那个元素是代表x祖的
apt[i].y = cyClient * aptFigure[i].y/100;
//这个也是一样的,怎么知道数组中的那些元素代表y组
} SetPolyFillMode(hdc, ALTERNATE);
Polygon(hdc, apt, 10); for(i =0; i<10; i++)
{
apt[i].x += cxClient/2;
} SetPolyFillMode(hdc, WINDING); Polygon(hdc, apt, 10); EndPaint(hwnd, &ps);
return 0; case WM_DESTROY:
PostQuitMessage(0);
return 0;
} return DefWindowProc(hwnd, message, wParam, lParam);
}
第二个问题不明白你的意思