// stack with integer values
#ifndef _ISTACK_H_
#define _ISTACK_H_

#include <stdio.h>
#include <stdlib.h>

// Structure for a stack item
struct StackItem {
    int value;         // Data value of this item in the list
    StackItem * next;  // Pointer to next item in list
};

// Initialize the stack as empty
void stackInitialize(StackItem * stack);

// Push the value on the stack
void push(StackItem * stack, int n);

// Pop the top value
int pop(StackItem * stack);

// Check if stack is empty
int stackIsEmpty(StackItem * stack);

// Display the stack
void stackDisplay(StackItem * stack);

#endif