#include <stdio.h>
#include <time.h>
time_t timer; // 時間の格納元
struct tm *ts; // time structure
// 日本時間(localtime)に変換
time(&timer);
ts = localtime(&timer);
//年月日、時刻を表示
printf("%d/%d/%d %02d:%02d::%02d \n",
ts->tm_year+1900,
ts->tm_mon+1,
ts->tm_mday,
ts->tm_hour,
ts->tm_min,
ts->tm_sec);