stos wskaz

#include <iostream>
using namespace std;
struct stos
{
	int wartosc;
	stos *next;
};
bool isempty(stos *top)
{
	return top==NULL;
}
bool push(stos *&top, int val)
{
	stos *nowy = new stos;
	nowy->next=top;
	nowy->wartosc=val;
	top=nowy;
	return 1;
}
bool pop(stos *&top, int &wart)
{
	if(isempty(top))
		return 0;
	stos *temp = new stos;
	temp=top;
	wart=temp->wartosc;
	top=temp->next;
	delete temp;
	return 1;
}
void showtop(stos *top)
{
	if(isempty(top))
		cout<<"Pusty"<<endl;
	else
		cout<<"top: "<<top->wartosc<<endl;
}



int main()
{
	stos *top = NULL;
	int val;
	push(top, 1);
	showtop(top);
	push(top, 2);
	showtop(top);
	push(top, 3);
	showtop(top);
	push(top, 4);
	showtop(top);
	push(top, 5);
	showtop(top);
	push(top, 6);
	showtop(top);
	push(top, 7);
	showtop(top);
	push(top, 8);
	showtop(top);
	pop(top, val);
	cout<<val<<endl;
	showtop(top);
	pop(top, val);
	cout<<val<<endl;
	showtop(top);
	pop(top, val);
	cout<<val<<endl;
	showtop(top);
	pop(top, val);
	cout<<val<<endl;
	showtop(top);
	pop(top, val);
	cout<<val<<endl;
	showtop(top);
	system("pause");




}