Problem O

Time Limit : 1000/1000ms (Java/Other) Memory Limit : 32768/32768K (Java/Other)

Total Submission(s) : 23 Accepted Submission(s) : 20

Problem Description

Give you a number on base ten,you should output it on base two.(0 < n < 1000)

Input

For each case there is a postive number n on base ten,
end of file.

Output

For each case output a number on base two.

Sample Input

1

2

3

Sample Output

1

10

11

把十进制变成2进制

#include<iostream>
using namespace std;
int main()
{
    int n;
    int b[11];
    while (cin >> n)
    {
        if (n == 0)
        {
            cout << "0" << endl;
            continue;
        }
        int k = 0;
        while(n)
        {
            b[k++] = n % 2;
            n /= 2;
        }
        for (int i = k - 1; i >= 0; i--)
            cout << b[i];
        cout << endl;
    }
    return 0;
}