Decimal to Binary

#include <bits/stdc++.h>
using namespace std;
void dectobinary(int n)
{
        int binarynum[32];
        int i=0;

        while(n!=0)
        {
                binarynum[i]=n%2;
                n=n/2;
                i++;
        }
        for(int j=i-1; j>=0; j--)
        {
                cout << binarynum[j];
        }
}
int main ()
{
        int n;
        cin >> n;
        dectobinary(n);
        return 0;
}