/*
 * File: lpyr.c
 * ----------------
 * Reads in a year and determines whether it is a
 * leap year.  A year is a leap year if it is
 * divisible by four, unless it is divisible by 100.
 * Years divisible by 100 are leap years only if
 * divisible by 400.
 *	
 *	Modified from "leapyear.c" by Jeff Tian to demonstrate
 *	use of nested "if" instead of compound conditions,
 *	and the use of pre-set default value.
 */

#include <stdio.h>
#include "genlib.h"
#include "simpio.h"

main()
{
    int year;
    bool isLeapYear;

    printf("Program to determine whether a year is a leap year.\n");
    printf("What year? ");
    year = GetInteger();
	
    isLeapYear = FALSE;
    if (year % 4 == 0)
    {
        if (year % 100 == 0)
        {
            if (year % 400 == 0) 
            {
                isLeapYear = TRUE;
            }
        }
        else
        {
        	isLeapYear = TRUE;
        }
    }

    if (isLeapYear) {
        printf("%d is a leap year.\n", year);
    } else {
        printf("%d is not a leap year.\n", year);
    }
}