comefrom: <awangdev>Pow(x, n)_2.java
code: public double pow(double x, int n) {
      	if (n == 0) {
      		return 1;
      	}
      	double num = pow(x, n/2);
      	if (n % 2 == 0) {
      		return num * num;
      	}
      	return num * num * x;
      }
masked: public double sample_funcname ( double x , int n ) {
    if ( n == 0 ) {
      return 1 ;
    }
    double num = pow ( x , n / 2 ) ;
    if ( n % 2 == 0 ) {
      return num * num ;
    }
    return num * num * x ;
  }
  