MFC開發（一）簡單同步時間應用程式
阿新 • • 發佈：2019-01-10
看了一個垃圾程式的架構，mmp真坑，自己費了一點功夫才搞定，就直接記錄下吧，這個是windows簡單的應用程式，但是裡面有點複雜，我們需要首先建立一個基於mfc的appwinzard程式，（憑記憶寫的，不知道單詞有沒有錯誤），然後我們直接在winmain類中新增下面的變數
# include<time.h> # define WM_CLOCK USER+20 # define WM_CLOCK_INTERVAL 1000 struct tm *newdate; time_t long_date; TCHAR szTimerTitle[MAXSTRING];
加下來由於我們呼叫了time.h檔案，但是我們並沒有含有這個檔案，我們這個時候直接生成time.h的檔案，內部程式碼如下：
//<time.h> #if _MSC_VER > 1000 #pragma once #endif #ifndef _INC_TIME #define _INC_TIME #if !defined(_WIN32) && !defined(_MAC) #error ERROR: Only Mac or Win32 targets supported! #endif #ifdef _MSC_VER /* * Currently, all MS C compilers for Win32 platforms default to 8 byte * alignment.*/ #pragma pack(push,8) #endif /* _MSC_VER */ #ifdef __cplusplus extern "C" { #endif /* Define _CRTIMP */ #ifndef _CRTIMP #ifdef _DLL #define _CRTIMP __declspec(dllimport) #else /* ndef _DLL */ #define _CRTIMP #endif /* _DLL */ #endif /* _CRTIMP */ /* Define __cdecl for non-Microsoft compilers */ #if( !defined(_MSC_VER) && !defined(__cdecl) ) #define __cdecl #endif /* Define _CRTAPI1 (for compatibility with the NT SDK) */ #ifndef _CRTAPI1 #if _MSC_VER >= 800 && _M_IX86 >= 300 #define _CRTAPI1 __cdecl #else #define _CRTAPI1 #endif #endif #ifndef _MAC #ifndef _WCHAR_T_DEFINED typedef unsigned short wchar_t; #define _WCHAR_T_DEFINED #endif #endif /* ndef _MAC */ /* Define the implementation defined time type */ #ifndef _TIME_T_DEFINED typedef long time_t; /* time value */ #define _TIME_T_DEFINED /* avoid multiple def's of time_t */ #endif #ifndef _CLOCK_T_DEFINED typedef long clock_t; #define _CLOCK_T_DEFINED #endif #ifndef _SIZE_T_DEFINED typedef unsigned int size_t; #define _SIZE_T_DEFINED #endif /* Define NULL pointer value */ #ifndef NULL #ifdef __cplusplus #define NULL 0 #else #define NULL ((void *)0) #endif #endif #ifndef _TM_DEFINED struct tm { int tm_sec; /* seconds after the minute - [0,59] */ int tm_min; /* minutes after the hour - [0,59] */ int tm_hour; /* hours since midnight - [0,23] */ int tm_mday; /* day of the month - [1,31] */ int tm_mon; /* months since January - [0,11] */ int tm_year; /* years since 1900 */ int tm_wday; /* days since Sunday - [0,6] */ int tm_yday; /* days since January 1 - [0,365] */ int tm_isdst; /* daylight savings time flag */ }; #define _TM_DEFINED #endif /* Clock ticks macro - ANSI version */ #define CLOCKS_PER_SEC 1000 /* Extern declarations for the global variables used by the ctime family of * routines. */ /* non-zero if daylight savings time is used */ _CRTIMP extern int _daylight; /* offset for Daylight Saving Time */ _CRTIMP extern long _dstbias; /* difference in seconds between GMT and local time */ _CRTIMP extern long _timezone; /* standard/daylight savings time zone names */ _CRTIMP extern char * _tzname[2]; /* Function prototypes */ _CRTIMP char * __cdecl asctime(const struct tm *); _CRTIMP char * __cdecl ctime(const time_t *); _CRTIMP clock_t __cdecl clock(void); _CRTIMP double __cdecl difftime(time_t, time_t); _CRTIMP struct tm * __cdecl gmtime(const time_t *); _CRTIMP struct tm * __cdecl localtime(const time_t *); _CRTIMP time_t __cdecl mktime(struct tm *); _CRTIMP size_t __cdecl strftime(char *, size_t, const char *, const struct tm *); _CRTIMP char * __cdecl _strdate(char *); _CRTIMP char * __cdecl _strtime(char *); _CRTIMP time_t __cdecl time(time_t *); #ifdef _POSIX_ _CRTIMP void __cdecl tzset(void); #else _CRTIMP void __cdecl _tzset(void); #endif /* --------- The following functions are OBSOLETE --------- */ /* The Win32 API GetLocalTime and SetLocalTime should be used instead. */ unsigned __cdecl _getsystime(struct tm *); unsigned __cdecl _setsystime(struct tm *, unsigned); /* --------- The preceding functions are OBSOLETE --------- */ #ifndef _SIZE_T_DEFINED typedef unsigned int size_t; #define _SIZE_T_DEFINED #endif #ifndef _MAC #ifndef _WTIME_DEFINED /* wide function prototypes, also declared in wchar.h */ _CRTIMP wchar_t * __cdecl _wasctime(const struct tm *); _CRTIMP wchar_t * __cdecl _wctime(const time_t *); _CRTIMP size_t __cdecl wcsftime(wchar_t *, size_t, const wchar_t *, const struct tm *); _CRTIMP wchar_t * __cdecl _wstrdate(wchar_t *); _CRTIMP wchar_t * __cdecl _wstrtime(wchar_t *); #define _WTIME_DEFINED #endif #endif /* ndef _MAC */ #if !__STDC__ || defined(_POSIX_) /* Non-ANSI names for compatibility */ #define CLK_TCK CLOCKS_PER_SEC _CRTIMP extern int daylight; _CRTIMP extern long timezone; _CRTIMP extern char * tzname[2]; _CRTIMP void __cdecl tzset(void); #endif /* __STDC__ */ #ifdef __cplusplus } #endif #ifdef _MSC_VER #pragma pack(pop) #endif /* _MSC_VER */ #endif /* _INC_TIME */
接著我們在initinstance類裡新增如下函式：
DrawText(hdc, szTimerTitle, strlen(szTimerTitle), &rt, DT_CENTER); case WM_TIMER: if(wParam == WM_TIMER_CLOCK) { time(&long_date); //獲取時間 newdate=localtime(&long_date); //轉化為本地時間 memset(szTimerTitle,0,sizeof(szTimerTitle)); strcpy(szTimerTitle,asctime(newdate)); //列印時間
UpdateWindow(hWnd); break; }
這個程式其實並沒有多少東西，但是主要自己智商時常不線上，在進行重做的時候有點zz,導致自己的分析過程短路。是以後應該避免的。