C++ program to perform a PUSH operation on a dynamically allocated stack

#include<iostream.h>
#include<conio.h>
struct Node {
	int data;
	Node *next;
}
*top,*p;
Node* newnode(int x) {
	p=new Node;
	p->data=x;
	p->next=NULL;
	return(p);
}
void push(Node *q) {
	if(top==NULL)
	top=q; else {
		q->next=top;
		top=q;
	}
}
void showstack(Node *q) {
	while(q!=NULL) {
		cout<<q->data<<” “;
		q=q->next;
	}
}
void main() {
	clrscr();
	int x;
	char ch=’y’;
	Node *nptr;
	while(ch==’y’||ch==’Y’) {
		cout<<“nEnter the data(int type):”;
		cin>>x;
		nptr=newnode(x);
		push(nptr);
		cout<<“nThe stack is:”;
		showstack(top);
		cout<<“nnWnat push more(y/n):”;
		cin>>ch;
	}
}