week.lst

星期算法,即知道日期,即可知道该天是星期几

C51 COMPILER V7.07   WEEK                                                                  06/09/2004 10:49:54 PAGE 1   


C51 COMPILER V7.07, COMPILATION OF MODULE WEEK
OBJECT MODULE PLACED IN week.OBJ
COMPILER INVOKED BY: C:\KEIL\C51\BIN\C51.EXE week.c BROWSE DEBUG OBJECTEXTEND

stmt level    source

   1          #include <stdio.h>
   2          #define uchar unsigned char
   3          #define uint unsigned int
   4          uchar week(uint year,uchar month,uchar day);
   5          void main(void)
   6          {
   7   1              uchar a;
   8   1              uchar month,day;
   9   1              uint year;
  10   1          year=1997;month=7;day=1;
  11   1                      while(1)
  12   1                      {
  13   2         a=week(year,month,day);
  14   2           }
  15   1      }
  16          
  17          uchar week(uint year,uchar month,uchar day)
  18          {
  19   1              uchar centry,return_week;
  20   1              centry=year/100;
  21   1              year=year%100;
  22   1              if(month>=3&month<=12) 
  23   1                 month=month-2;
  24   1              else
  25   1                 {
  26   2                    month=month+12-2;
  27   2                        year=year-1;
  28   2                      }
  29   1              return_week=( day+(13*month-1)/5+year+centry/4+year/4-2*centry )%7;
  30   1              return return_week;
  31   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    179    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----       8
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


C51 COMPILATION COMPLETE.  0 WARNING(S),  0 ERROR(S)