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Convert a UTC time value

#include <stdio.h> #include <time.h> #include <stdlib.h> int main(int argc, char *argv[]) { struct tm *tm_ptr; time_t the_time; if(argc == 2) the_time = atoi(argv[1]); else (void)time(&the_time); tm_ptr = gmtime(&the_time); printf("raw `UTC' : %ld\n", the_time); printf("ctime : %s", ctime(&the_time)); printf("gmtime : %02d:%02d:%02d - %02d/%02d/%02d\n", tm_ptr->tm_hour, tm_ptr->tm_min, tm_ptr->tm_sec, tm_ptr->tm_year - 100, tm_ptr->tm_mon + 1, tm_ptr->tm_mday); return 0; }