25、记录时间的几种方法

方法一：

View Code

#include <time.h>
#include <stdio.h>
void main( void )
{
time_t ltime;
time( &ltime );
printf( "The time is %s\n", ctime(&ltime ) );
}

方法二：

struct timeval start;

struct timeval end;

float time_use = 0;

gettimeofday(&start,NULL); 

//do some operation

gettimeofday(&end,NULL);

time_use = end.tv_sec - start.tv_sec; //in sec

方法三：

struct tm *local;

time_t t;

time(&t);

local=localtime(&t);

char ctime[30];

memset(ctime, 0, 30);

sprintf(time, "[%d:%d:%d]",local->tm_hour, local->tm_min, local->tm_sec);

cout << time;