Using a constructor and destructor.

 

#include <iostream>
using namespace std;

#define SIZE 10

class stack {
  int stck[SIZE];
  int topOfStack;
public:
  stack();  // constructor
  ~stack(); // destructor
  void push(int i);
  int pop();
};

// constructor
stack::stack(){
  topOfStack = 0;
  cout << "Stack Initialized\n";
}

// destructor
stack::~stack(){
  cout << "Stack Destroyed\n";
}

void stack::push(int i){
  if( topOfStack == SIZE ) {
    cout << "Stack is full.\n";
    return;
  }
  stck[ topOfStack ] = i;
  topOfStack++;
}

int stack::pop() {
  if( topOfStack == 0 ) {
    cout << "Stack underflow.\n";
    return 0;
  }
  topOfStack--;
  return stck[ topOfStack ];
}

int main()
{
  stack a, b;
  
  a.push(1);
  b.push(2);

  a.push(3);
  b.push(4);

  cout << a.pop() << " ";
  cout << a.pop() << " ";
  cout << b.pop() << " ";
  cout << b.pop() << endl;

  return 0;
}

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3.	Derived constructor uses no parameters
4.	Define and use the destructor
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6.	Implement a destructor
7.	Define destrcuctor outside the class definition

Using a constructor and destructor. : Destructor « Class « C++

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