rili.c

一个用C语言写的万年历小程序

#include<stdio.h>
#include<conio.h>
#include<stdlib.h>
int IsLeapYear(int); 
void main()
{
 int i;
 int day;
 int year;
 int temp;
 int temp_i;
 long int Year_days = 0;
 int Year_Start = 1;
 int Per_Year_Days;
 int month_day[]={31,28,31,30,31,30,31,31,30,31,30,31,29};
 printf("Please enter the year: ");
 scanf("%d",&year);
 while(Year_Start<year)
 {
  if(IsLeapYear(Year_Start))
   Per_Year_Days =366;
  else
   Per_Year_Days =365;
  Year_days = Year_days + Per_Year_Days;
  Year_Start++;
 }
 for(temp=1;temp<=12;temp++)
 {
  switch(temp)
  {
   case 1:
    printf("    January(%d)\n",year);
    break;
   case 2:
    printf("    February(%d)\n",year);
    break;
   case 3:
    printf("    March(%d)\n",year);
    break;
   case 4:
    printf("    April(%d)\n",year);
    break;
   case 5:
    printf("    May(%d)\n",year);
    break;
   case 6:
    printf("    June(%d)\n",year);
    break;
   case 7:
    printf("    July(%d)\n",year);
    break;
   case 8:
    printf("    August(%d)\n",year);
    break;
   case 9:
    printf("    September(%d)\n",year);
    break;
   case 10:
    printf("    October(%d)\n",year);
    break;
   case 11:
    printf("   November(%d)\n",year);
    break;
   case 12:
    printf("   December(%d)\n",year);
    break;
  }
  i=Year_days%7;
  printf("Mon Tue Wed Thu Fri Sat Sun\n");
  if(i!=0)
   for(temp_i=0;temp_i<i;temp_i++)
    printf("    ");
  day=1;
  if(IsLeapYear(year)&&temp==2)
   while(day<=month_day[12])
   {
    if(day>1)
     if(Year_days%7==0)
      printf("\n");
    if(day>=10)
     printf("%d  ",day);
    else
     printf("%d   ",day);
    Year_days++;
    day++;
   }
 else
   while(day<=month_day[temp-1])
   {
    if(day>1)
     if(Year_days%7==0)
      printf("\n");
    if(day>=10)
     printf("%d  ",day);
    else
     printf("%d   ",day);
    Year_days++;
    day++;
   }
  printf("\n");
  if(getch()=='q')
   exit(0);
 }
 getch();
}
int IsLeapYear(int year)
{
 if((year%4==0)&&(year%100!=0)||(year%400==0))
  return 1;
 else
  return 0;
}