帮忙看看这个时钟程序

[taoanran]

#include <windows.h>
#include <time.h>
#include <string.h>
LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;

int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,

PSTR szCmdLine, int iCmdShow)

{


static TCHAR szAppName[] = TEXT ("HelloWin") ;

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 ("This program requires Windows XP!"),

szAppName, MB_ICONERROR) ;

return 0 ;

}

hwnd = CreateWindow( szAppName,

TEXT ("关机定时器"),

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 ;

}


long CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)//窗口消息处理程序

{

HDC hdc ;


PAINTSTRUCT ps ;

RECT rect ;



switch (message)
{
case WM_CREATE:

//PlaySound (TEXT ("关机.wav"), NULL, SND_FILENAME | SND_ASYNC) ;
SetTimer(hwnd,1,1000,NULL);
return 0 ;


case WM_PAINT:
{
int space_num=0,n=0;
char timing[30];
char *p1;
time_t t;

time(&t);
p1=ctime(&t);

while(1)
{
if(p1[n]==' ')
{
space_num++;
p1++;
}
else p1++;
if(space_num==3)
{
while(p1[n]!=' ')
{
timing[n]=p1[n];
n++;
}
timing[n]='\0';
break;
}
}

if(strcmp("08:33:50",timing)==0)//问题处在这！！！！！！
{
MessageBox(hwnd,"到时间啦，关机了!!","关机提示",MB_YESNO);

}
hdc=BeginPaint(hwnd,&ps) ;

GetClientRect (hwnd,&rect) ;

DrawText (hdc, TEXT(ctime(&t)), -1, &rect,

DT_SINGLELINE | DT_CENTER | DT_VCENTER) ;


EndPaint (hwnd, &ps) ;

return 0 ;
}

case WM_TIMER:
InvalidateRect(hwnd, NULL, TRUE);
return 0;


case WM_DESTROY:
KillTimer(hwnd,1);
PostQuitMessage (0) ;

return 0 ;

}

return DefWindowProc (hwnd, message, wParam, lParam) ;

}

/*
这是一个闹钟，希望在某一时刻提示用户“时间到了”，但是在MessageBox那条语句那，循环执行了，
我希望只执行一次（就是不会出现 对话框 一直出现，关不掉这种情况），能帮忙解决吗？？
*/

[ToperRay]

调试timing这个值，你看看对不对啊。

[luckyboy101]

if(strcmp("08:33:50",timing)==0)//问题处在这！！！！！！
{
KillTimer(hwnd,1);
MessageBox(hwnd,"到时间啦，关机了!!","关机提示",MB_YESNO);
}
//你的定时器要等程序关闭了才被关闭，当然一直会跳出对话框了，此外MessageBox跳出来以后，要等点击是或者否按钮才顺序往下执行，所以定时器要放在MessageBox之前关闭

[luckyboy101]

还有一点是你这个提醒为什么要放到WM_PAINT里，要用WM_TIMER去刷新页面，这样的话即使没有定时器，页面重画也会触发WM_PAINT执行。为什么不直接放在WM_TIMER消息里去执行？

[la_feng]

#include <windows.h> 
#include <time.h> 
#include <string.h> 
LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ; 

int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance, 
					
					PSTR szCmdLine, int iCmdShow) 
					
{ 
	
	
    static TCHAR szAppName[] = TEXT ("HelloWin") ; 
	
    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 ("This program requires Windows XP!"), 
			
			szAppName, MB_ICONERROR) ; 
        
		return 0 ; 
        
    } 
	
    hwnd = CreateWindow( szAppName, 
        
		TEXT ("关机定时器"), 
		
		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 ; 
	
} 


long CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)//窗口消息处理程序 

{ 
	
    HDC                  hdc ; 
	
	
    PAINTSTRUCT ps ; 
	
    RECT          rect ; 
	
	int space_num=0,n=0; 
	char timing[30]; 
	char *p1; 
	time_t t; 
	
    switch (message) 
    {      
    case WM_CREATE: 
        
        //PlaySound (TEXT ("关机.wav"), NULL, SND_FILENAME | SND_ASYNC) ; 
        SetTimer(hwnd,1,1000,NULL); 
		return 0 ; 
		
		
    case  WM_PAINT: 
		{ 
			time(&t);
			
            hdc=BeginPaint(hwnd,&ps) ; 
			
            GetClientRect (hwnd,&rect) ; 
            
            DrawText (hdc, TEXT(ctime(&t)), -1, &rect, 
				
				DT_SINGLELINE | DT_CENTER | DT_VCENTER) ; 
			
			
			EndPaint (hwnd, &ps) ; 
			
			return 0 ; 
		} 
        
	case  WM_TIMER:
		
		
		time(&t); 
        p1=ctime(&t); 
        
        while(1) 
        { 
			if(p1[n]==' ') 
			{ 
				space_num++; 
				p1++; 
			} 
			else p1++; 
			if(space_num==3) 
			{ 
				while(p1[n]!=' ') 
				{ 
					timing[n]=p1[n]; 
					n++; 
				} 
				timing[n]='\0'; 
				break; 
			} 
        } 
		
		if(strcmp("09:08:40",timing)==0)//问题处在这！！！！！！ 
		{ 
			MessageBox(hwnd,"到时间啦，关机了!!","关机提示",MB_YESNO);
			KillTimer(hwnd,1);            
		}
		InvalidateRect(hwnd, NULL, TRUE);
		
		return 0; 
		
		
	case  WM_DESTROY: 
		KillTimer(hwnd,1); 
		PostQuitMessage (0) ; 
        
		return 0 ;
   
    } 
	
	return DefWindowProc (hwnd, message, wParam, lParam) ; 
	
}

[TADICAN]

循环刷新导致的问题。
把提示放到WM_TIMER里面去吧。