Stack Example
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#include <iostream>
#include "stack.h"
using namespace std ;
int main () {
// Create an empty stack of data type int.
Stack < int > stack ;
// Push 1 into stack.
if ( stack . push ( 1 ))
cout << 1 << " successfully pushed. \n " ;
else
cout << "failed to push " << 1 << endl ;
// Push 2 into stack.
if ( stack . push ( 2 ))
cout << 2 << " successfully pushed. \n " ;
else
cout << "failed to push " << 2 << endl ;
// Push 3 into stack.
if ( stack . push ( 3 ))
cout << 3 << " successfully pushed. \n " ;
else
cout << "failed to push " << 3 << endl ;
// Retrieve top element of stack.
int retrievedNumber ;
if ( stack . top ( retrievedNumber ))
cout << "Top element: " << retrievedNumber << endl ;
else
cout << "No Top element. \n " ;
// Pop element from stack.
if ( stack . pop ())
cout << "Element popped. \n " ;
else
cout << "Unable to pop. \n " ;
// Retrieve top element from stack.
if ( stack . top ( retrievedNumber ))
cout << "Top element: " << retrievedNumber << endl ;
else
cout << "No Top element. \n " ;
// Check if stack is empty.
if ( stack . is_empty ())
cout << "Stack is empty. \n " ;
else
cout << "Stack is not empty. \n " ;
// Pop element from stack.
if ( stack . pop ())
cout << "Element popped. \n " ;
else
cout << "Unable to pop. \n " ;
// Pop element from stack.
if ( stack . pop ())
cout << "Element popped. \n " ;
else
cout << "Unable to pop. \n " ;
// Check if stack is empty.
if ( stack . is_empty ())
cout << "Stack is empty. \n " ;
else
cout << "Stack is not empty. \n " ;
}
Sample Output
1 successfully pushed.
2 successfully pushed.
3 successfully pushed.
Top element: 3
Element popped.
Top element: 2
Stack is not empty
Element popped.
Element popped.
Stack is empty.