Pilha

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

struct Node{
    int valor;
    struct Node *point;
    };

typedef struct Node node;
 int menu(){
    int op;
    printf(" ______________Menu_____________\n");
    printf("|                               |\n");
    printf("|0- Sair                        |\n");
    printf("|1- Inserir                     |\n");
    printf("|2- Remover                     |\n");
    printf("|3- Mostrar                     |\n");
    printf("|_______________________________|\n");
    printf("\nInsira sua opcao: ");
    scanf("%d",&op);
    return op;
    }
    /*
void push(node **top,int valor){

    node *temp = (node*) malloc(sizeof(node*));
    temp->point=*top;
    temp->valor=valor;
    *top=temp;

    }

void mostrar(node **top) {

    node * temp = *top;
    while(temp != NULL) {
        printf("%d\n", temp->valor);
        temp = temp->point;
    }

}

int pop(node **top){
    int x;
    node *temp = *top;
    x=temp->valor;
    temp=temp->point;
    *top=temp;
     return x;
    }
    */

void push(node *top,int valor){

    node *novo = (node*) malloc(sizeof(node*));
    node *aux = top->point;
        novo->valor=valor;
        novo->point=aux;
        top->point=novo;
    }


int pop(node *top){

    node *temp = top;
    node *aux;
    aux=temp->point;
    temp=aux;
    int x;
    x=temp->valor;
    temp=temp->point;
    free(temp);
    return x;
    }

void mostrar(node *top) {

    node * temp = top;
    node *aux;
    aux=temp->point;
    temp=aux;
    while(temp != NULL){
        printf("%d\n", temp->valor);
        temp = temp->point;
    }

}

int main(){
    node top;
    top.point=NULL;
    int valor,op;

do{
        op=menu();
        switch(op){
            case 0: break;
            case 1:
                  printf("Digite o valor a inserir: ");
                  scanf ("%d",&valor);
                  push(&top,valor);
                  break;
             case 2:
                  printf("%d\n",pop(&top));
                   break;
             case 3:
                  mostrar(&top);
                    break;

             default:
                   printf("Opcao invalida\n");
                    break;
            }
            system("pause");
            system("cls");
        }while(op!=0);
    return 0;
    }