C program to print calendar

C program to print calendar

Output:

Enter a year to print calendar: 2015
Calendar for Year: 2015
January

Sun  Mon  Tue  Wed  Thu  Fri  Sat
                      1    2    3
  4    5    6    7    8    9   10
 11   12   13   14   15   16   17
 18   19   20   21   22   23   24
 25   26   27   28   29   30   31
 
---------------------------------
February

Sun  Mon  Tue  Wed  Thu  Fri  Sat
  1    2    3    4    5    6    7
  8    9   10   11   12   13   14
 15   16   17   18   19   20   21
 22   23   24   25   26   27   28
 
---------------------------------
March

Sun  Mon  Tue  Wed  Thu  Fri  Sat
  1    2    3    4    5    6    7
  8    9   10   11   12   13   14
 15   16   17   18   19   20   21
 22   23   24   25   26   27   28
 29   30   31   
---------------------------------
April

Sun  Mon  Tue  Wed  Thu  Fri  Sat
                 1    2    3    4
  5    6    7    8    9   10   11
 12   13   14   15   16   17   18
 19   20   21   22   23   24   25
 26   27   28   29   30   
---------------------------------
May

Sun  Mon  Tue  Wed  Thu  Fri  Sat
                           1    2
  3    4    5    6    7    8    9
 10   11   12   13   14   15   16
 17   18   19   20   21   22   23
 24   25   26   27   28   29   30
 31   
---------------------------------
June

Sun  Mon  Tue  Wed  Thu  Fri  Sat
       1    2    3    4    5    6
  7    8    9   10   11   12   13
 14   15   16   17   18   19   20
 21   22   23   24   25   26   27
 28   29   30   
---------------------------------
July

Sun  Mon  Tue  Wed  Thu  Fri  Sat
                 1    2    3    4
  5    6    7    8    9   10   11
 12   13   14   15   16   17   18
 19   20   21   22   23   24   25
 26   27   28   29   30   31   
---------------------------------
August

Sun  Mon  Tue  Wed  Thu  Fri  Sat
                                1
  2    3    4    5    6    7    8
  9   10   11   12   13   14   15
 16   17   18   19   20   21   22
 23   24   25   26   27   28   29
 30   31   
---------------------------------
September

Sun  Mon  Tue  Wed  Thu  Fri  Sat
            1    2    3    4    5
  6    7    8    9   10   11   12
 13   14   15   16   17   18   19
 20   21   22   23   24   25   26
 27   28   29   30   
---------------------------------
October

Sun  Mon  Tue  Wed  Thu  Fri  Sat
                      1    2    3
  4    5    6    7    8    9   10
 11   12   13   14   15   16   17
 18   19   20   21   22   23   24
 25   26   27   28   29   30   31
 
---------------------------------
November

Sun  Mon  Tue  Wed  Thu  Fri  Sat
  1    2    3    4    5    6    7
  8    9   10   11   12   13   14
 15   16   17   18   19   20   21
 22   23   24   25   26   27   28
 29   30   
---------------------------------
December

Sun  Mon  Tue  Wed  Thu  Fri  Sat
            1    2    3    4    5
  6    7    8    9   10   11   12
 13   14   15   16   17   18   19
 20   21   22   23   24   25   26
 27   28   29   30   31   
---------------------------------

Implementation:

#include<stdio.h> char *mon_name[]={" ","January","February","March","April", "May","June","July","August","September", "October","November","December" }; int days[]={0,31,28,31,30,31,30,31,31,30,31,30,31}; int main(void) { int day,month,year,code,x,y,z; printf("Enter a year to print calendar: \n"); scanf("%d", &year); x=(year-1.)/4.0; y=(year-1.)/100.; z=(year-1.)/400.; code=(year+x-y+z)%7; if(year%4==0&&year%100!=0||year%400==0) days[2]=29; else days[2]=28; printf("Calendar for Year: %d\n",year); for(month=1;month<=12;month++) { printf("%s",mon_name[month]); printf("\n\nSun Mon Tue Wed Thu Fri Sat\n" ); for(day=1; day<=1+code*5; day++) { printf(" "); } for(day=1;day<=days[month];day++) { printf("%2d",day); if((day+code)%7>0) printf(" "); else printf("\n "); } code=(code+days[month])%7; printf("\n---------------------------------\n"); } }