Question

A year with 366 days is called a leap year. A year is a leap year if it is divisible by four (for example, 1980), except that it is not a leap year if it is divisible by 100 (for example, 1900); however, it is a leap year if it is divisible by 400 (for example, 2000). There were no exceptions before the introduction of the Gregorian calendar on October 15, 1582 (1500 was a leap year).

Write a program in C++ that asks the user for a year and computes whether that year is a leap year.

Answer 1

Please find the code for the following:

Code:

#include <iostream>
using namespace std;

int main()
{
int year;
//Accept the user input
cout<<"Enter a year: ";
cin>>year;
  
//We need to change the order of the conditions which is mentioned in the question
//Because - Consider the year 1900, in the first condition which is provided in the
//question, we need to check if it is divisible by 4 then 100.
//1900 is divisible by 4, as per the Condition it should be a leap year
//But 1900 is not a leap year, since as per the second Condition it is divisible by 100
//So, To avoid all this, I just changeed the order as per the logic
  
//Since there are no Exceptions for the year till 1582, we made extra cases for that
if (year < 1582 && year % 4 == 0)
cout<<year<<" is a leap year";
else if (year < 1582)
cout<<year<<" is not a leap year";
else if (year >= 1582)
{
//Condition 3: It is a leap year if it is divisible by 400
//check if it is divisible by 4, then it is a leap year
if(year%400==0)
cout<<year<<" is a leap year";
  
//Condition 2: It is not a leap year if it is divisible by 100
//Check if it is divisible by 100,then it is not leap year
else if(year%100 == 0)
cout<<year<<" is a not a leap year";
  
//Condition 1: A year is a leap year if it is divisible by four
//Check if it is divisible by 4, then it is a leap year
else if(year % 4==0)
cout<<year<<" is a leap year";
  
//Finally, if is not divisible by any ,then not a leap year
else
cout<<year<<" is a not leap year";
}
return 0;
}

Please check the compiled program and its output for your reference:

Output:
Sample case-1:

Sample case-2:

Sample case-3:

Sample case-4:

(I believe that I made the code simple and understandable. If you still have any query, Feel free to drop me a comment)

Hope this Helps!!!
Please upvote as well, If you got the answer?
If not please comment, I will Help you with that...