Answer:
Following program in c language:
#include <stdio.h> // header file
int main() // main method
{
int year1 ; // varuiable declaration
printf("Enter year: ");
scanf("%d",&year1); // input year
if(year1<1582) // checking condition if year less then 1582
{
printf(" invalid year please input correct year");
}
else
{
if(year1 % 4 == 0) // checking condition of leap year
{
if( year1 % 100 == 0) // checking condition of leap year
{
if ( year1 % 400 != 0)
printf("%d is a Leap Year", year1);
else
printf("%d is not a Leap Year", year1);
}
else
printf("%d is a Leap Year", year1 );
}
else
printf("%d is not a Leap Year", year1);
}
return 0;
}
Output:
First output
Enter year: 2004
2004 is a leap year
Second output
Enter year: 2003
2003 is not a leap year
Third output
Enter year: 200
invalid year please input correct year
Explanation:
In this program we input a year by user in "year1" variable .Initially check if year is less then 1582 then display message in console " invalid year please input correct year" otherwise control moves to else block and check the condition which is given below.
A year is leap year if it is satisfied these condition
(year1 % 4 == 0) and (year1 % 100 == 0) and (year1 % 400 != 0)
Otherwise it is not a leap year.
