Exponent.com code example

Example: exponent

int binaryExponentiation(int x,int n)
{
    if(n==0)
        return 1;
    else if(n%2 == 0)        //n is even
        return binaryExponentiation(x*x,n/2);
    else                             //n is odd
        return x*binaryExponentiation(x*x,(n-1)/2);
}