백준 11005 c++

#include <iostream>
#include <cstring>

using namespace std;

int main(void)
{
	int N, B, i, temp;
	char arr2[40] = {};

	cin >> N >> B;
	if ((N > 0 && N <= 1000000000) && (B >= 2 && B <= 36))
	{
		i = 0;
		while (N != 0)
		{	
			temp = N % B;
			if (temp >= 10 && temp <= 35)
			{
				temp = temp + 55;
			}
			else
			{
				temp = temp + 48;
			}
			arr2[i] = temp;
			N = N / B;
			i++;
		}
		for (i = (int)strlen(arr2) - 1; i >= 0; i--)
		{
			cout << arr2[i];
		}
		cout << endl;
	}
	else
	{
		;
	}

	return 0;
}