Implementing Stack in C. Using Linked List

/* Implementing Stack in C. Using Linked List */

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

struct Node
{
    int data;
    struct Node* next;
}*top = NULL;

void push(int value)
{
    struct Node* newNode;
    newNode = (struct Node*)malloc(sizeof(struct Node));
    newNode->data = value;
    if (top == NULL)
        newNode->next = NULL;
    else
        newNode->next = top;

    top = newNode;
    printf("\nInsertion is Successful!!!\n");
}

void pop()
{
    if (top == NULL)
        printf("\nStack is Empty!!!\n");
    else
    {
        struct Node* temp = top;
        printf("\n to beDeleted element: %d", temp->data);
        top = temp->next;
        free(temp);
    }
}
void print()
{
    if (top == NULL)
        printf("\nStack is Empty!!!\n");
    else {
        struct Node* temp = top;
        while (temp->next != NULL) {
            printf("%d--->", temp->data);
            temp = temp->next;
        }
        printf("%d--->NULL", temp->data);
    }
}

int main()
{
    int choice, value;
    printf("\n:: Stack using Linked List ::\n");
    while (1)
    {
        printf("\n****** MENU ******\n");
        printf("1. Push\n2. Pop\n3. Print\n4. Exit\n");
        printf("Enter your choice: ");
        scanf("%d", &choice);
        switch (choice)
        {
        case 1: printf("Enter the value to be insert: ");
            scanf("%d", &value);
            push(value);
            break;
        case 2: pop(); break;
        case 3: print(); break;
        case 4: exit(0);
        default: printf("\nWrong selection!!! Please try again!!!\n");
        }
    }
    return 0;
}


/*
:: Stack using Linked List ::

****** MENU ******
1. Push
2. Pop
3. Print
4. Exit
Enter your choice: 1
Enter the value to be insert: 10

Insertion is Successful!!!

****** MENU ******
1. Push
2. Pop
3. Print
4. Exit
Enter your choice: 1
Enter the value to be insert: 20

Insertion is Successful!!!

****** MENU ******
1. Push
2. Pop
3. Print
4. Exit
Enter your choice: 2

 to beDeleted element: 20
****** MENU ******
1. Push
2. Pop
3. Print
4. Exit
Enter your choice: 3
10--->NULL
****** MENU ******
1. Push
2. Pop
3. Print
4. Exit
Enter your choice: 4
*/