// Written by Hosung Leo Kim

#include <iostream>

typedef double arrElem;

class Stack
{

private:

  const static int  max = 5;
  arrElem           array[ max ];
  int               numberUsed;
  
public:

  Stack() { numberUsed = 0; }
  
  void push( arrElem d )
  {
    array[ numberUsed ] = d;
    numberUsed++;
  }
  
  arrElem pop() 
  { 
    arrElem popped = array[ numberUsed - 1 ];
    numberUsed--;
    return popped;
  }
  
  arrElem top()
  {
    return array[ numberUsed - 1 ];
  }
};

int main()
{
  Stack myStack;
  
  myStack.push( 1.2 );
  myStack.push( 2.3 );
  
  cout << myStack.top() << endl;
  
  myStack.pop();
  
  cout << myStack.top() << endl;

  return 0;
}

/*
/homes/home30/hkim16/107> a.out        
2.3
1.2
/homes/home30/hkim16/107> 
*/