com.controlStructures

Interface HappinessDetector

public interface HappinessDetector

Classes that implement this interface can determine if a number is happy.

Method Summary

Modifier and Type	Method and Description
boolean	isHappy(int num, int a, int b) Returns true if the given value is happy and false otherwise.

Method Detail

isHappy

boolean isHappy(int num,
                int a,
                int b)

Returns true if the given value is happy and false otherwise. The following rules determine if a number is happy

1. General rule: A number is happy if it is divisible by a, unless it is also divisible by b.
2. Numbers between 30 and 54 exclusive are always happy, even if they would be unhappy under the General Rule
3. Numbers less than 16 are happy, if and only if, they would be unhappy when the General Rule is applied
4. Odd numbers between 81 and 99 inclusive are always happy, even if they would be unhappy under the General Rule
5. Numbers less than 0 are never happy regardless of any other rules.

Parameters:

num - the number for which happiness will be determined

a - under the general rule, num will only be happy if divisible by this number

b - under the general rule, num will not be happy if divisible by this number, even if divisible by a

Returns:

true if num is happy and false otherwise