C calendar !!

# Include "stdio. H" <br/> int isleapyear (INT year) <br/>{< br/> If (Year % 4! = 0 | year % 100 = 0) & (Year % 400! = 0) <br/> return 0; <br/> else <br/> return 1; <br/>}< br/> int firstdayofyear (INT year) <br/> {<br/> return (Year + (year-1)/4 + (year-1)/400-(year-1)/100) % 7; <br/>}< br/> main () <br/> {<br/> char * monthname [13] = {"", "August ", "August ", "August", "August", "August" };< br/> int numday_month [13] =, 31 }; <br/> int firstday_month [13]; <br/> int workarray [13]; <br/> int year; <br/> char ch; <br/> int I, m, n; <br/> DO <br/> {<br/> system ("CLS "); // clear screen effect <br/> printf ("/N"); <br/> printf ("/N "); <br/> printf ("/N"); <br/> printf ("/N "); <br/> printf ("Enter the year to be queried:"); </P> <p> scanf ("% d", & year ); </P> <p> If (isleapyear (year) <br/> numday_month [2] = 29; </P> <p> firstday_month [1] = firstdayofyear (year); <br/> for (I = 2; I <= 12; I ++) <br/> firstday_month [I] = (firstday_month [I-1] + numday_month [I-1]) % 7; <br/> for (I = 1; I <= 12; I ++) <br/> workarray [I] =-firstday_month [I]; </P> <p> printf ("% 34 S ",""); <br/> printf ("Year % d/N", year); <br/> for (I = 1; I <= 12; I ++) <br/>{< br/> printf ("/N"); <br/> printf ("% 32 s/n", monthname [I]); <br/> // printf ("% 22 s ",""); <br/> printf ("Sunday/T Monday/t Tuesday/T Wednesday/T Friday/T Saturday/N "); <br/> for (M = 1; m <= 6; m ++) <br/> {<br/> // printf ("% 18 s ", ""); <br/> for (n = 1; n <= 7; n ++) <br/> {<br/> workarray [I] ++; <br/> If (workarray [I]> 0 & workarray [I] <= numday_month [I]) <br/> printf ("% d/T ", workarray [I]); <br/> else <br/> printf ("/t"); <br/>}< br/> printf ("/N "); <br/>}</P> <p> system ("pause "); <br/>}< br/> printf ("/n whether to continue to press y/y and other keys to exit the system :"); <br/> scanf ("% C", & Ch); <br/>}while (CH = 'y' | CH = 'y '); <br/>}