通过头文件 time.h中的接口获取系统当前时间的方法

 #include <time.h>
  

82     struct tm *t;
  83     time_t tt;
  84     time_t ts;
  85     
  86     struct tm tr = {0};
  87     
  88     time(&tt);
  89     t = localtime(&tt);
  90     printf("localtime %4d%02d%02d %02d:%02d:%02d\n", t->tm_year + 1900, t->tm_mon + 1, t->tm_mday, t->tm_hour, t->tm_min, t->tm_sec);