#include<stdio.h>
#include<time.h>
void main()
{ time_t tim;
struct tm *at;
char now[40];
time(&tim);
at=localtime(&tim);
strftime(now,40,"%Y%m%d\n",at);
puts(now);
at->tm_mon+=3;
strftime(now,40,"%Y%m%d\n",at);
puts(now);
}
显示当前系统时间和三个月的系统时间