LeetCode -- Ugly Number

public class Solution {
    public bool IsUgly(int num) 
    {
        if(num <= 0){
            return false;
        }
        num = Divide(num,2);
    	num = Divide(num,3);
    	num = Divide(num,5);
    	
    	return num == 1;
    }


private int Divide(int num, int a)
{
	while(num % a == 0){
		num /= a;
	}
	return num;
}


}

LeetCode -- Ugly Number

原文：http://blog.csdn.net/lan_liang/article/details/49885485