//LF_DateTime.h

#include <time.h>

class CLF_DateTime
{
private:
struct tm *local;
time_t t;
char str[80];
public:
CLF_DateTime(int year, int month, int day,int hour, int min,int sec);
~CLF_DateTime(void);
void display(char* strdisplay);
};


//LF_DateTime.cpp

#include "LF_DateTime.h"
#include <time.h>
#include <iostream>

using namespace std;

CLF_DateTime::CLF_DateTime(int year, int month, int day,int hour, int min,int sec)
{
local = new tm;
local->tm_year = year;
local->tm_mon = month;
local->tm_mday = day;
local->tm_hour =0;
local->tm_min =0;
local->tm_sec =0;

}

CLF_DateTime::~CLF_DateTime(void)
{
delete(local);
}

void CLF_DateTime::display(char* strdisplay)
{

strftime(str,80,"%Y-%m-%d %H:%M:%S",local);
cout<<str<<endl;

}
int _tmain(int argc, _TCHAR* argv[])
{
CLF_DateTime *pa;
char testdisplay[256];

pa = new CLF_DateTime(2005,10 ,01 , 11,50,23);
pa->display(testdisplay);

cout<<testdisplay<<endl;

return 0;
}

编译可以通过!但执行后出现的都是乱码!我想要的结果应该是"2005-10-01 11:50:23"

我修改后如下 可以正常显示
//LF_DateTime.h

class CLF_DateTime
{
private:
struct tm *local;
time_t t;
// char str[80];
public:
CLF_DateTime(int year, int month, int day,int hour, int min,int sec);
~CLF_DateTime(void);
void display(char * strdisplay);
};

//LF_DateTime.cpp

#include <time.h>
#include <iostream>

using namespace std;

CLF_DateTime::CLF_DateTime(int year, int month, int day,int hour, int min,int sec)
{
local = new tm;
local->tm_year = year-1900;//tm_year是从1900年起开始计算 也就是说他显示2007时tm_year值并不是2007
local->tm_mon = month-1;//月份可见definition里有说明是[0,11]所以比现实小了一个月
local->tm_mday = day;
local->tm_hour =hour;
local->tm_min =min;
local->tm_sec =sec;

}

CLF_DateTime::~CLF_DateTime(void)
{
delete(local);
}

void CLF_DateTime::display(char * strdisplay)
{

strftime(strdisplay,80,"%Y-%m-%d %H:%M:%S",local);//这里并未用到str[80]
cout<<strdisplay<<endl;


}

int main()
{
CLF_DateTime *pa;
char testdisplay[256];

pa = new CLF_DateTime(2005,10,01,11,50,23);
pa->display(testdisplay);
cout<<testdisplay<<endl;//重复输出

return 0;
}

// ddaet.cpp : Defines the entry point for the console application.
//

#include "StdAfx.h"
#include <time.h>
#include <iostream>
#include <tchar.h>
#include <string>

using namespace std;

#include <time.h>

class CLF_DateTime
{
private:
struct tm *local;
time_t t;
char str[80];
public:
CLF_DateTime(int year, int month, int day,int hour, int min,int sec);
~CLF_DateTime(void);
void display(char* strdisplay);
};

CLF_DateTime::CLF_DateTime(int year, int month, int day,int hour, int min,int sec)
{
local = new tm;
local->tm_year = year -1900;
local->tm_mon = month;
local->tm_mday = day;
local->tm_hour =0;
local->tm_min =0;
local->tm_sec =0;

}

CLF_DateTime::~CLF_DateTime(void)
{
delete(local);
}

void CLF_DateTime::display(char* strdisplay)
{

strftime(strdisplay,256,"%Y-%m-%d %H:%M:%S",local);

cout<<strdisplay<<endl;


}

int main(int argc, _TCHAR* argv[])
{

CLF_DateTime *pa;
char testdisplay[256];

pa = new CLF_DateTime(2005,10 ,01 , 11,50,23);
pa->display(testdisplay);

cout<<testdisplay<<endl;

return 0;
}