Praktikum 7 Struktur Data

#include <cstdlib>
#include<iostream.h>
#define maks 5
#include<string.h>

   class Stack {
      friend ostream& operator<<(ostream&,const Stack&);
   public:
      Stack();
      int penuh(int);
      int kosong(int);
      void cetak();
      void push(char);
      char pop();
   private:
      char A[maks];
      int banyak;
  };
  ostream& operator <<(ostream& out,con
st Stack& s)
    {
           cout<<"\n Isi stack: ";
    for(int i=0;i<s.banyak;i++)
     out<<s.A[i]<<" ";
     }
Stack::Stack() {
   banyak =0;
   for(int i=0;i<maks;i++)
    A[i]='0';
   }
int Stack::penuh (int s)  {
   return s ==maks ? 1:0; }

int Stack::kosong(int s) {
   return s ==0 ? 1:0; }