A Templated Stack Data Structure Example. - Data Structures Source Code in C++

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Home » C++ Home » Data Structures Home » A Templated Stack Data Structure Example.

A D V E R T I S E M E N T

Title	A Templated Stack Data Structure Example.
Author	Sanchit Karve
Author Email	born2c0de [at] hotmail.com
Description	This Code is an example on how to use a templated stack class. HIGHLY COMMENTED.
Category	C++ » Data Structures
Hits	366942
Code	Select and Copy the Code
#include <dos.h> // For sleep() #include <iostream.h> // For I/0 #include <windows.h> // FOR MessageBox() API #include <conio.h> #define MAX 10 // MAXIMUM STACK CONTENT template <class T> // Using Templates so that any type of data can be // stored in Stack without multiple defination of class class stack { protected: T arr[MAX]; // Contains all the Data public: T item,r; int top; //Contains location of Topmost Data pushed onto Stack stack() //Constructor { for(int i=0;i<MAX;i++) { arr[i]=NULL; //Initialises all Stack Contents to NULL } top=-1; //Sets the Top Location to -1 indicating an empty stack } void push(T a) // Push ie. Add Value Function { top++; // increment to by 1 if(top<MAX) { arr[top]=a; //If Stack is Vacant store Value in Array } else // Bug the User { MessageBox(0,"STACK IS FULL","STACK WARNING!",MB_ICONSTOP); top--; } } T pop() // Delete Item. Returns the deleted item { if(top==-1) { MessageBox(0,"STACK IS EMPTY ","WARNING",MB_ICONSTOP); return NULL; } else { T data=arr[top]; //Set Topmost Value in data arr[top]=NULL; //Set Original Location to NULL top--; // Decrement top by 1 return data; // Return deleted item } } }; void main() { stack <int>a; // Create object of class a with int Template int opt=1; while (opt!=3) { clrscr(); cout<<" MAX STACK CAPACITY="<<((MAX-a.top)-1)<<" "; cout<<"1) Push Item "; cout<<"2) Pop Item "; cout<<"3) Exit "; cout<<"Option?"; cin>>opt; switch(opt) { case 1: cout<<"Which Number should be pushed?"; cin>>a.item; a.push(a.item); break; case 2: a.r=a.pop(); cout<<"Item popped from Stack is:"<<a.r<<endl; sleep(2); break; } } }

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