#include <iostream.h>


float pow ( float, int ); 

int main () 
{ 
  for ( int i=1; i<10; i++ ) 
  {
  cout << "for i = " << i << " resultat: "  << pow ( 2, i ) << '\n';
 
  }
} 

float pow ( float x, int n ) 
{ 
  if ( n < 0 ) 
   cout << "error\n";
  switch ( n ) 
 { 
    case 0:  return 1; 
    case 1:  return x; 
    default:
    
    return x * pow (x, n - 1); 
 } 
}