Crear estructura de datos de pila
// C++ program for linked list implementation of stack
#include <bits/stdc++.h>
using namespace std;
// A structure to represent a stack
class StackNode {
public:
int data;
StackNode* next;
};
StackNode* newNode(int data)
{
StackNode* stackNode = new StackNode();
stackNode->data = data;
stackNode->next = NULL;
return stackNode;
}
int isEmpty(StackNode* root)
{
return !root;
}
void push(StackNode** root, int data)
{
StackNode* stackNode = newNode(data);
stackNode->next = *root;
*root = stackNode;
cout << data << " pushed to stack\n";
}
int pop(StackNode** root)
{
if (isEmpty(*root))
return INT_MIN;
StackNode* temp = *root;
*root = (*root)->next;
int popped = temp->data;
free(temp);
return popped;
}
int peek(StackNode* root)
{
if (isEmpty(root))
return INT_MIN;
return root->data;
}
// Driver code
int main()
{
StackNode* root = NULL;
push(&root, 10);
push(&root, 20);
push(&root, 30);
cout << pop(&root) << " popped from stack\n";
cout << "Top element is " << peek(root) << endl;
cout<<"Elements present in stack : ";
//print all elements in stack :
while(!isEmpty(root))
{
// print top element in stack
cout<<peek(root)<<" ";
// remove top element in stack
pop(&root);
}
return 0;
}
// This is code is contributed by rathbhupendra
Juan D Khusuma