C语言获取系统时间并转换成字符串

 #include <time.h>
 #include <stdio.h>
 
 int
 main(int argc, char *argv[]) {
   time_t tt = time(0);
   char buf[32] = {0};
   strftime(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S", localtime(&tt));
   return 0;
 }