10進制轉2進制

無聊寫的，算法寫的很糟，歡迎批評指正

#include <iostream>
#include <cmath>
using namespace std;

void Dec_Bin(int);

int main()
{
        int num;
        cout << "Please input a DEC number:";
        cin >> num;
        Dec_Bin(num);
        cout << endl;
        system("pause");
        return 0;
}

void Dec_Bin(int num)
{
        int temp[255], i = 0;
        while(num > 0)
        {
                temp[i] = num % 2;
                num = floor(num / 2);
                i++;
        }
        cout << "Bin is:";
        while(i > 0)
        {
                cout << temp[i-1];
                i--;
        }
        cout << endl;
}