再问time_t的转换问题，因为还没解决掉，郁闷.....

[wangsiyuanoo]

想把time_t tTime = 1245028047;
转换成字符串：string strTime = "2009-06-15 09:07:27";
如何用代码实现？

[superyys]

哈哈,,LZ正解..捡分的

[DreamFreeLancer]

ctime(&tTime)

[gykgod]

不用这么麻烦，直接调用俩函数即可，_strdate输出日期字符串，_strtime输出时间字符串。

标准做法如下：

#include <time.h>
#include <stdio.h>

void main( void )
{
   char dbuffer [9];
   char tbuffer [9];
   _strdate( dbuffer );
   printf( "The current date is %s \n", dbuffer );
   _strtime( tbuffer );
   printf( "The current time is %s \n", tbuffer );
}

[「已注销」]

#include <windows.h>
#include <cstdio>
#include <string>
using namespace std;

const __int64 nano100SecInDay=(__int64)10000000*60*60*24;
ULARGE_INTEGER now;
int days = 14;
bool backup = false;
string dst_dir;
string backup_dir;

void make_sure_dir_exist(string & file)
{
    int tag = 2;
    while(true)
    {
        tag = file.find_first_of("\\",tag+1);
        if(tag!=-1)
        {
            string tmp = file.substr(0,tag);
            ::CreateDirectory(tmp.c_str(),NULL);
        }
        else
        {
            break;
        }
    }
}

void xdel(const char *dir)
{
    char tempFileFind[1024];
    sprintf(tempFileFind,"%s\\*.*",dir);
    
    WIN32_FIND_DATA ffd;
    HANDLE hFind;
    hFind = ::FindFirstFile(tempFileFind,&ffd);
    
    if(hFind == INVALID_HANDLE_VALUE)
    {
        printf("can't find %s\n",dir);
        return;
    }
    
    while(true)
    {
        //printf("find %s\n",ffd.cFileName);
        FILETIME &ft = ffd.ftLastWriteTime;
        ULARGE_INTEGER ui;
        memcpy(&ui,&ft,sizeof(ui));
        __int64 t = now.QuadPart-ui.QuadPart;
        
        if(ffd.dwFileAttributes&FILE_ATTRIBUTE_DIRECTORY)
        {
            if(strcmp(ffd.cFileName, ".") && strcmp(ffd.cFileName, ".."))
            {
                char temp[1024];
                sprintf(temp,"%s\\%s",dir,ffd.cFileName);
                xdel(temp);
                
                if(t>=nano100SecInDay*days)
                {
                    if(::RemoveDirectory(temp))
                    {
                        printf("del dir %s ok\n",temp);
                    }
                    else
                    {
                        printf("del dir %s failed\n",temp);
                    }
                }
            }
        }
        else
        {
            char temp[1024];
            sprintf(temp,"%s\\%s",dir,ffd.cFileName);
            
            if(t>=nano100SecInDay*days)
            {
                if(backup)
                {
                    string backup_file = temp;
                    backup_file.replace(0,dst_dir.length(),backup_dir.c_str());
                    make_sure_dir_exist(backup_file);
                    if(::MoveFile(temp,backup_file.c_str()))
                    {
                        printf("backup file %s ok\n",temp);
                    }
                    else
                    {
                        printf("backup file %s failed\n",temp);
                    }
                }
                else
                {
                    SetFileAttributes(temp,FILE_ATTRIBUTE_NORMAL);
                    if(::DeleteFile(temp))
                    {
                        printf("del file %s ok\n",temp);
                    }
                    else
                    {
                        printf("del file %s failed\n",temp);
                    }
                }
            }
        }
        if (!FindNextFile(hFind, &ffd)) 
        {
            break;
        }
    }
    FindClose(hFind);
}

int main(int argc,char ** argv)
{
    if(argc<2)
    {
        printf("usage: xdel directory /d= /m=\n");
        printf("[optional] /d: config the expired days,default is 14 days\n");
        printf("[optional] /m: config the backup directory\n"); 
        printf("for example: xdel d:\\test /d=10 /m=d:\\backup");
        return 1;
    }
    
    for(int i=1;i<argc;++i)
    {
        string tmp = argv[i];
        if(tmp.find("/d=")!=-1)
        {
            int d = atoi(tmp.substr(3).c_str());
            if(d!=0)
            {
                days =d;
            }
        }
        else if(tmp.find("/m=")!=-1)
        {
            backup = true;
            backup_dir = tmp.substr(3);
        }
        else
        {
            dst_dir = tmp;
        }
    }
    
    //Get system time
    SYSTEMTIME st;
    ::GetSystemTime(&st);
    FILETIME f;
    ::SystemTimeToFileTime(&st,&f);
    memcpy(&now,&f,sizeof(now));
    
    xdel(argv[1]);
    
    return 0;
}

[gykgod]

你要想转换格式，也很简单：

#include <time.h>
#include <stdio.h>
#include <string.h>

void main()
{
    char tmpbuf[128];
    time_t ltime;
    
    struct tm *today;

    time( <ime );
    today = localtime( <ime );

    strftime( tmpbuf, 128,
         "%Y/%m/%d  %H:%M:%S\n", today );
    printf( tmpbuf );
}

[lingyin55]

void TimeToString1(unsigned long t_time, char* pTime)
{
int year=0,mon=0,day=0,hour=0,min=0,sec=0;
struct tm *m_tm;
m_tm = gmtime(&(time_t)t_time);
year = m_tm->tm_year+1900;
mon = m_tm->tm_mon+1;
day = m_tm->tm_mday;
hour = m_tm->tm_hour;
min = m_tm->tm_min;
sec = m_tm->tm_sec;
sprintf(pTime, "%04d-%02d-%02d %d:%d:%d", year, mon, day, hour, min, sec);
}

int TimeToString2(unsigned long t_time, char *buf)
{
if (t_time < 0)
{
return -1;
}
struct tm *m_tm;
m_tm = gmtime(&(time_t)t_time);
strftime(buf, 15, "%Y%m%d%H%M%S", m_tm);
return 0;
}
http://blog.chinaunix.net/u1/41982/showart_1902757.html

[hybest007]

char sTime[100]={0};
string s;
sprintf(sTime, "%04d%02d%02d %02d:%02d:%02d", local_time->tm_year + 1900, local_time->tm_mon + 1, local_time->tm_mday,local_time->tm_hour, local_time->tm_min, local_time->tm_sec);
s=sTime;

[hybest007]

int iTime=1243742819;

time_t iTime2 = iTime;
struct tm *local_time = localtime(&iTime2);

char sTime[100];
string s;
sprintf(sTime, "%04d%02d%02d %02d:%02d:%02d", local_time->tm_year + 1900, local_time->tm_mon + 1, local_time->tm_mday,local_time->tm_hour, local_time->tm_min, local_time->tm_sec);
s=sTime;