Ugly Number 寻找丑数 简单题

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 factor

7

.
Note that

1

is typically treated
as an ugly number.
Credits:

Special thanks to @jianchao.li.fighter for adding this problem and creating all test cases.

class Solution {
public:
    bool isUgly(int num) {
        
        if(num==0)
            return false;
        while(num%2==0)
           num=num/2;
        while(num%3==0)
           num=num/3;
        while(num%5==0)
           num=num/5;
        if(num==1)
            return true;
        else
            return false;
    }
};