julian.c

C语言常用的程序900例

#include <stdio.h>
#include <time.h>

void main(void)
 {
   time_t seconds;

   struct tm time_fields;

   time_fields.tm_mday = 4;
   time_fields.tm_mon = 7;
   time_fields.tm_year = 94;
   
   if (mktime(&time_fields) == -1)
     printf("Error converting fields\n");
   else
     printf("Julian date for July 4, 1994 is %d\n", 
       time_fields.tm_yday);
 }