02050621.c

用C语言实现的日历生成的程序

#include<stdio.h>
int monthDay(int,int);
int IsLeapYear(int);
main()
{
      int days,weekDay,year,month=1,d,i;
      printf("please input the year:\n");
      scanf("%d",&year);
      days=year-1+(year-1)/400+(year-1)/4-(year-1)/100;
      
      while(month<=12){ 
      printf("\t\t\t%d-%d\n",year,month);
      printf("Sun\tMon\tTues\tWed\tThur\tFir\tSat\n");
      d=1,i=1;
      weekDay=(days+1)%7;
        while(i<=weekDay)
        {
          printf("\t");
          i++;
        }
      while(d<=monthDay(month,year))
      {
                             
         weekDay=(days+1)%7;
      
      if(weekDay==6)
      printf("%d\n",d);
      else
      printf("%d\t",d);
      if(d==monthDay(month,year))
      printf("\n");
      d++;
      days++;
     
      
      }
       month++;
      }
      system("PAUSE");
      return 0;
}

int monthDay(int month, int year)
{
    switch(month){
    case 1:case 3:case 5:case 7:case 8:case 10:case 12:
         return 31;
         break;
    case 4: case 6:case 9:case 11:
         return 30;
         break;
    case 2:
         if((IsLeapYear(year))==1)
         
         return 29;
         else
         return 28;
         break;
}
}
int IsLeapYear(int year)
{
    
    if((year%4==0)&&(year%100!=0))
    
    return 1;
   if(year%400==0)
    return 1;
   
    return 0;
}