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.

class Solution {
public:
bool isUgly(int num)
{
if(num == 0)
return false;
int tmp = num;

while(tmp % 2 == 0)
tmp = tmp/2;
while(tmp % 3 == 0)
tmp = tmp/3;
while(tmp % 5 == 0)
tmp = tmp/5;
if(tmp != 1)
{
return false;
}
return true;
}
};