Question

A simple program implementing abstract data types.

Answer 1

C++ program that creates an abstract data type in the form of a stack, in which items can be pushed onto the top and popped off the top. 
......
#include <iostream>

using namespace std;

//limit size of browser stack to 100

#define MAX_SIZE 100

class Stack {

 public:

  int top;

  int size[MAX_SIZE];

  

  //constructor

  Stack() {

   //no top yet

   top = -1;

  }

  //function declarations

  bool push(int page);

  int pop();

  bool is_empty();

};

//Functions created below

//are we empty?

bool Stack::is_empty() {

 return (top < 0);

}

//pop from stack (back button)

int Stack::pop() {

 if(top < 0) {

  cout << "Nothing here...";

  return 0;

 } else {

  int page = size[top--];

  return page;

 }

}

//push onto stack

bool Stack::push(int page) {

 if(top >= MAX_SIZE) {

  cout << "Can't anymore, Jim";

  return false;

 } else {

  size[++top] = page;

  return true;

 }

}

......
main functions for creating instance
......
int main( ) {

 //new stack

 Stack pages;

 pages.push(5);

 pages.push(10);

 pages.push(15);

 pages.push(20);

 

 cout << " Page " << pages.pop() << " popped from stack " << endl;

 cout << " Page " << pages.pop() << " popped from stack " << endl;

 

 return 0;

}

...
sorry for a little different method for declaring functions from a class. but you will get what you need