leetcode 263 Ugly Number

Ugly Number

Write a program to check whether a given number is an ugly number.

Ugly numbers are positive numbers whose prime factors only include 2, 3, 5. For example,6, 8 are ugly while 14 is not ugly since it includes another prime factor7.

Note that 1 is typically treated as an ugly number.

代码：

bool isUgly(int num) {    if(num <= 0)        return false;    while(num % 2 ==0)        num /= 2;    while(num % 3 ==0)        num /= 3;    while(num % 5 ==0)        num /= 5;    return (num == 1)?true:false;}

原题地址：https://leetcode.com/problems/ugly-number/