a034: 二進位制轉換 FYI: https://yunlinsong.blogspot.com/2016/02/blog-post_9.html

a034.cpp

#include <iostream>

using namespace std;

int main()
{
    int n;
    while(cin >> n)
    {
        string msg;

        while( n > 0)
        {
            if( n % 2 == 1 )
                msg.insert(0, "1");
            else
                msg.insert(0, "0");

            n = n / 2;
        }

        cout << msg << endl;
    }
    return 0;
}