谁能帮我解答哈。。用VC++解决。。。
/ 2007.10.5.cpp : Defines the entry point for the application.
//
#include "stdafx.h"
#include "resource.h"
#include <iostream.h>
#include <math.h>
#include <stdlib.h>
#include <stdio.h>
#define MAX_LOADSTRING 100
#define pi 3.1415926535
int Num=2,MaxNum=20;
// Global Variables:
HINSTANCE hInst; // current instance
TCHAR szTitle[MAX_LOADSTRING]; // The title bar text
TCHAR szWindowClass[MAX_LOADSTRING]; // The title bar text
// Foward declarations of functions included in this code module:
ATOM MyRegisterClass(HINSTANCE hInstance);
BOOL InitInstance(HINSTANCE, int);
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
LRESULT CALLBACK About(HWND, UINT, WPARAM, LPARAM);
int APIENTRY WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow)
{
// TODO: Place code here.
MSG msg;
HACCEL hAccelTable;
// Initialize global strings
LoadString(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);
LoadString(hInstance, IDC_LX4_8_1, szWindowClass, MAX_LOADSTRING);
MyRegisterClass(hInstance);
// Perform application initialization:
if (!InitInstance (hInstance, nCmdShow))
{
return FALSE;
}
hAccelTable = LoadAccelerators(hInstance, (LPCTSTR)IDC_LX4_8_1);
// Main message loop:
while (GetMessage(&msg, NULL, 0, 0))
{
if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}
return msg.wParam;
}
//
// FUNCTION: MyRegisterClass()
//
// PURPOSE: Registers the window class.
//
// COMMENTS:
//
// This function and its usage is only necessary if you want this code
// to be compatible with Win32 systems prior to the 'RegisterClassEx'
// function that was added to Windows 95. It is important to call this function
// so that the application will get 'well formed' small icons associated
// with it.
//
ATOM MyRegisterClass(HINSTANCE hInstance)
{
WNDCLASSEX wcex;
wcex.cbSize = sizeof(WNDCLASSEX);
wcex.style = CS_HREDRAW | CS_VREDRAW;
wcex.lpfnWndProc = (WNDPROC)WndProc;
wcex.cbClsExtra = 0;
wcex.cbWndExtra = 0;
wcex.hInstance = hInstance;
wcex.hIcon = LoadIcon(hInstance, (LPCTSTR)IDI_LX4_8_1);
wcex.hCursor = LoadCursor(NULL, IDC_ARROW);
wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
wcex.lpszMenuName = (LPCSTR)IDC_LX4_8_1;
wcex.lpszClassName = szWindowClass;
wcex.hIconSm = LoadIcon(wcex.hInstance, (LPCTSTR)IDI_SMALL);
return RegisterClassEx(&wcex);
}
//
// FUNCTION: InitInstance(HANDLE, int)
//
// PURPOSE: Saves instance handle and creates main window
//
// COMMENTS:
//
// In this function, we save the instance handle in a global variable and
// create and display the main program window.
//
BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)
{
HWND hWnd;
hInst = hInstance; // Store instance handle in our global variable
hWnd = CreateWindow(szWindowClass, szTitle, WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, hInstance, NULL);
if (!hWnd)
{
return FALSE;
}
ShowWindow(hWnd, nCmdShow);
UpdateWindow(hWnd);
return TRUE;
}
//
// FUNCTION: WndProc(HWND, unsigned, WORD, LONG)
//
// PURPOSE: Processes messages for the main window.
//
// WM_COMMAND - process the application menu
// WM_PAINT - Paint the main window
// WM_DESTROY - post a quit message and return
//
//
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
int wmId, wmEvent;
HPEN hPen;
HBRUSH hBrush;
int CentreX,CentreY,CentreX1,CentreY1,CentreX2,CentreY2;
double flag;
PAINTSTRUCT ps;
HDC hdc;
TCHAR szHello[MAX_LOADSTRING];
LoadString(hInst, IDS_HELLO, szHello, MAX_LOADSTRING);
switch (message)
{
case WM_COMMAND:
wmId = LOWORD(wParam);
wmEvent = HIWORD(wParam);
// Parse the menu selections:
switch (wmId)
{
case IDM_ABOUT:
DialogBox(hInst, (LPCTSTR)IDD_ABOUTBOX, hWnd, (DLGPROC)About);
break;
case IDM_EXIT:
DestroyWindow(hWnd);
break;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
break;
case WM_PAINT:
hdc = BeginPaint(hWnd, &ps);
// TODO: Add any drawing code here...]
SetWindowExtEx(hdc,650,540,NULL);
SetViewportExtEx(hdc,650,540,NULL);
SetViewportOrgEx(hdc,350,250,NULL);
hPen=CreatePen(PS_SOLID,2,RGB(255,255,255));
SelectObject(hdc,hPen);
Ellipse(hdc,-200,-200,200,200);
DeleteObject(hPen);
hBrush=CreateSolidBrush(RGB(255,0,0));
SelectObject(hdc,hBrush);
hPen=CreatePen(PS_SOLID,0.1,RGB(255,0,0));
SelectObject(hdc,hPen);
flag=2*pi/MaxNum*Num;
CentreX=(int)(100*cos(flag));
CentreY=(int)(100*sin(flag));
Pie(hdc,CentreX-100,CentreY-100,
CentreX+100,CentreY+100,
(int)(CentreX+100*cos(flag)),(int)(CentreY+100*sin(flag)),
(int)(CentreX+100*cos(flag+pi)),(int)(CentreY+100*sin(flag+pi))
);
DeleteObject(hBrush);
DeleteObject(hPen);
hBrush=CreateSolidBrush(RGB(0,255,0));
SelectObject(hdc,hBrush);
hPen=CreatePen(PS_SOLID,0.1,RGB(0,255,0));
SelectObject(hdc,hPen);
CentreX1=(int)(100*cos(flag+2*pi/3));
CentreY1=(int)(100*sin(flag+2*pi/3));
Pie(hdc,CentreX1-100,CentreY1-100,
CentreX1+100,CentreY1+100,
(int)(CentreX1+100*cos(flag+2*pi/3)),(int)(CentreY1+100*sin(flag+2*pi/3)),
(int)(CentreX1+100*cos(flag+2*pi/3+pi)),(int)(CentreY1+100*sin(flag+2*pi/3+pi))
);
DeleteObject(hBrush);
DeleteObject(hPen);
hBrush=CreateSolidBrush(RGB(0,0,255));
SelectObject(hdc,hBrush);
hPen=CreatePen(PS_SOLID,0.1,RGB(0,0,255));
SelectObject(hdc,hPen);
CentreX2=(int)(100*cos(flag+4*pi/3));
CentreY2=(int)(100*sin(flag+4*pi/3));
Pie(hdc,CentreX2-100,CentreY2-100,
CentreX2+100,CentreY2+100,
(int)(CentreX2+100*cos(flag+4*pi/3)),(int)(CentreY2+100*sin(4*pi/3)),
(int)(CentreX2+100*cos(flag+pi+4*pi/3)),(int)(CentreY2+100*sin(flag+pi+4*pi/3))
);
DeleteObject(hBrush);
DeleteObject(hPen);
RECT rt;
GetClientRect(hWnd, &rt);
DrawText(hdc, szHello, strlen(szHello), &rt, DT_CENTER);
EndPaint(hWnd, &ps);
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
return 0;
}
// Mesage handler for about box.
LRESULT CALLBACK About(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam)
{
switch (message)
{
case WM_INITDIALOG:
return TRUE;
case WM_COMMAND:
if (LOWORD(wParam) == IDOK || LOWORD(wParam) == IDCANCEL)
{
EndDialog(hDlg, LOWORD(wParam));
return TRUE;
}
break;
}
return FALSE;
}