Stack(O.K)

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// stack.cpp: определяет точку входа для консольного приложения.
//
#include "stdafx.h"
#include <iostream>
#include <conio.h>
using namespace std;
struct chain
{
int num;
chain *next;
};
chain * push(chain*, int);
chain * pop(chain*);
void Process(chain*);
void printstack(chain*);
int _tmain(int argc, _TCHAR* argv[])
{
int quentity, number;
chain* top = NULL;
cout << "Enter the number of stacks: ";
cin >> quentity;
for (int i = 0; i < quentity; i++)
{
cout << "[" << i + 1 << "]: ";
cin >> number;
top = push(top, number);
}
cout << "The stack before processing: ";
printstack(top);
Process(top);
_getch();
return 0;
}
chain * push(chain* top, int what)
{
chain * pv = new chain;
pv->num = what;
pv->next = top;
return pv;
}
chain * pop(chain * top)
{
chain * pv = top->next;
delete top;
return pv;
}
void printstack(chain* top)
{
while (top)
{
cout << top->num << " ";
top = top->next;
}
cout << endl;
}
void Process(chain* top)
{
chain *pol = NULL;
chain *otr = NULL;
while (top)
{
if (top->num >= 0)
pol = push(pol, top->num);
else
otr = push(otr, top->num);
top = top->next;
}
cout << "Pol: ";
printstack(pol);
cout << endl;
cout << "Otr: ";
printstack(otr);
}