1 #include <time.h> 2 #include <stdio.h> 3   4   5 typedef enum 6 { 7     false = 0, 8     true = 1 9 } bool;10  11 bool check_date(int year, int month, int day)12 {13     if (year < 1900 || month <= 0 || month > 1214         || day <= 0 || day > 31)15           return false;16  17     struct tm tm_new;18     tm_new.tm_year = year - 1900;19     tm_new.tm_mon = month - 1;20     tm_new.tm_mday = day;21     tm_new.tm_hour = 0;22     tm_new.tm_min = 0;23     tm_new.tm_sec = 0;24  25     time_t time_new = mktime(&tm_new);26     localtime_r(&time_new, &tm_new);27  28     if (tm_new.tm_year != year - 1900 || tm_new.tm_mon != month - 1 || tm_new.tm_mday != day)29           return false;30     return true;31 }