Stack.h

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#ifndef _STACK_H_INCLUDED_
#define _STACK_H_INCLUDED_

#include "Node.h"

class Stack {
    friend void print_stack( Stack const& st );
        Node head;
public:
    // Constructor
        Stack();

    // Destructor
    ~Stack();

    // Push new element to the stack:
    void push( int value );

    // Pop element from the stack:
    void pop();

    // Writeable access to element on top of the stack:
    int& top();

    // Read-only access to element on top of the stack:
    int top() const;

    // Return stack size:
    size_t size() const;

    // Return true if stack is empty
    bool empty() const;

};//class Stack

// Print contents of the stack:
void print_stack( Stack const& st );

#endif //_STACK_H_INCLUDED_

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