3. MFC原理介绍

包括C++封装原理和MFC六大关键技术，以及类向导和MFC应用程序向导的使用方法。讲解MFC消息映射机制的原理、消息映射函数的建立，以及消息发送和接收的方法。

CTime类

void CTmDlg::OnButton1() 
{
    CTime t = CTime::GetCurrentTime();
    int nYear = t.GetYear();
    int nMonth = t.GetMonth();
    int nDay = t.GetDay();
    int nHour = t.GetHour();
    int nMin = t.GetMinute();
    int nSec = t.GetSecond();
    int nWeek = t.GetDayOfWeek();//周三
    CString str;
    str.Format("当前时间是：%d年%02d月%02d日 %02d:%02d:%02d",
        nYear,nMonth,nDay,nHour,nMin,nSec);
    //AfxMessageBox(str);
    SetWindowText(str);//SetTimer
}

void CTmDlg::OnButton2() 
{
    time_t tt = time(NULL);
    tm * pTime = localtime(&tt);
    int nYear = pTime ->tm_year+1900;
    int nMonth = pTime ->tm_mon+1;
    int nDay = pTime ->tm_mday;
    int nHour = pTime ->tm_hour;
    int nMin = pTime ->tm_min;
    int nSec = pTime ->tm_sec;
    CString str;
    str.Format("当前时间是：%d年%02d月%02d日 %02d:%02d:%02d",
        nYear,nMonth,nDay,nHour,nMin,nSec);
    //AfxMessageBox(str);
    SetWindowText(str);//SetTimer

}

类

#include "stdafx.h"
#include <time.h>
#include <stdio.h>
#include "MyTime.h"
int APIENTRY WinMain(HINSTANCE hInstance,
                     HINSTANCE hPrevInstance,
                     LPSTR     lpCmdLine,
                     int       nCmdShow)
{
    CMyTime t = CMyTime::GetCurrentTime();
    int nYear = t.GetYear();
     //CTime time;
/*    time_t tt = time(NULL);
    tm * pTime = localtime(&tt);
    int nYear = pTime ->tm_year+1900;
    int nMonth = pTime ->tm_mon+1;
    int nDay = pTime ->tm_mday;
    int nHour = pTime ->tm_hour;
    int nMin = pTime ->tm_min;
    int nSec = pTime ->tm_sec;
    char s[200];
    sprintf(s,"当前时间是：%d年%02d月%02d日 %02d:%02d:%02d",
        nYear,nMonth,nDay,nHour,nMin,nSec);
    MessageBox(NULL,s,"提示",0);*/
    return 0;
}