Untitled

#include<stdio.h>
#include<conio.h>
#include<stdlib.h>
struct node
{
	int x;
	struct node *next;
}*top;
void push();
void pop();
void peep();
int main()
{
	int op;
	do{
		printf("\n...MENU...");
		printf("\n1)Push node\n2)Pop node");
		printf("\nenter 0 for EXIT");
		printf("\nEnter your option :");
		scanf("%d",&op);
		switch(op)
		{
			case 1:
				push();
				break;
			case 2:
				pop();
				break;
			case 0:
				printf("\n...BYE BYE!...");
				break;
			default :
				printf("\nINVALID option");
				break;
		}
	}while(op!=0);
	return 0;
}
void push()
{
	struct node *ptr;
	ptr=(struct node *)malloc(sizeof(struct node));
	if(ptr==NULL)
	{
		printf("\nstack overflow");
		return;
	}
	printf("\npush element in node=");
	scanf("%d",&ptr->x);
	ptr->next=top;
	top=ptr;
	peep();
}
void pop()
{
	struct node *ptr;
	ptr=top;
	if(top==NULL)
	{
		printf("\nstack is empty");
		return;
	}
	printf("\n%d is poped",ptr->x);
	top=top->next;
	free(ptr);
	peep();
}
void peep()
{
	struct node *ptr;
	ptr=top;
	if(top==NULL)
	{
		printf("\nstack is empty");
		return;
	}
	while(ptr!=NULL)
	{
		printf("\nelement=%d",ptr->x);
		ptr=ptr->next;
	}
}