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指定格式打印出来。。
void print_time()
{
struct timeval tv;
struct tm* ptm;
char time_str[128];
long milliseconds;
gettimeofday(&tv, NULL);
ptm = localtime(&tv.tv_sec);
strftime(time_str, sizeof(time_str), "%Y-%m-%d %H:%M:%S", ptm);
milliseconds = tv.tv_sec / 1000;
printf("%s.%03ld\n", time_str, milliseconds);
}
#include "stdio.h"
#include "time.h"
#include "stdlib.h"
int main()
{
time_t t;
int j;
j = time(&t);
printf("j=%d", j);
return 0;
}