C++获取本地时间常见方法汇总

#include <iostream>
using namespace std;
#include <time.h>

time_t t = time(NULL);
struct tm* stime=localtime(&t);
char tmp[32]={NULL};
sprintf(tmp, "%04d-%02d-%02d %02d:%02d:%02d",1900+stime->tm_year,1+stime->tm_mon,stime->tm_mday, stime->tm_hour,stime->tm_min,stime->tm_sec);
cout<<tmp<<endl;

#include <iostream>
using namespace std;
#include <time.h>

time_t t = time(0); 
char tmp[32]={NULL};
strftime(tmp, sizeof(tmp), "%Y-%m-%d %H:%M:%S",localtime(&t)); 
cout<<tmp<<endl;

#include <iostream>
using namespace std;
#include <time.h>
#include <string>

time_t tm;
time(&tm);
char tmp[128]={NULL};
strcpy(tmp,ctime(&tm));
//或者
//struct tm* stime=localtime(&tm);
//strcpy(tmp,asctime(stime));
cout<<tmp<<endl;

#include <iostream>
using namespace std;
#include <time.h>
#include <windows.h>

SYSTEMTIME sys; 
GetLocalTime(&sys);
char tmp[64]={NULL};
sprintf(tmp,"%4d-%02d-%02d %02d:%02d:%02d ms:%03d",sys.wYear,sys.wMonth,sys.wDay,sys.wHour,sys.wMinute,sys.wSecond,sys.wMilliseconds); 
cout<<tmp<<endl;

#include <sys/time.h> 
#include <unistd.h>

struct timeval now_time;
gettimeofday(&now_time, NULL);
time_t tt = now_time.tv_sec;
tm *temp = localtime(&tt);
char time_str[32]={NULL};
sprintf(time_str,"%04d-%02d-%02d%02d:%02d:%02d",temp->tm_year+ 1900,temp->tm_mon+1,temp->tm_mday,temp->tm_hour,temp->tm_min, temp->tm_sec);
cout<<tmp<<endl;

#ifndef _CLOCK_T_DEFINED
typedef long clock_t;
#define _CLOCK_T_DEFINED
#endif

#define CLOCKS_PER_SEC ((clock_t)1000)

clock_t clock( void );

//获取逝去时间
clock_t start, finish;
start=clock();
…
finish=clock();

//逝去多少秒
long duration=(finish- start)/ CLOCKS_PER_SEC;

struct tm * gmtime(const time_t *timer);
struct tm * localtime(const time_t * timer);

time_t mktime(struct tm * timeptr);