julian.c

C_C++程序员实用大全（精华版）源代码 代码详实 一步一步深入 适合各阶段程序员的使用

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

void main(void)
 {
   time_t seconds;

   struct tm time_fields;

   time_fields.tm_mday = 31;
   time_fields.tm_mon = 12;
   time_fields.tm_year = 101;

   if (mktime(&time_fields) == -1)
     printf("Error converting fields\n");
   else
     printf("Julian date for December 31, 2001 is %d\n", time_fields.tm_yday);
 }