POSTEST 7,Rabu 08 Desember 2010,07.30-09.00

#include <cstdlib>
#include <iostream>
#define maks 5
using namespace std;
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, const Stack& s)
{
cout << “\nIsi 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;
}

void Stack::cetak()
{
cout << “\nIsi stack :”;
for (int i=0;i< banyak;i++)
cout << A[i] << ” “;
}

void Stack::push(char x)
{
cout << “\nElemen masuk :” << x;
if (penuh(banyak)) cout << “Stack penuh”;
else if (A[0]==’0′){
A[0] = x;
banyak++; }
else {
for (int i=banyak; i>=0; i–)
A[i+1] = A[i];
A[0] = x;
banyak++; }
}

char Stack::pop()
{
cout <<“\nPop stack, elemen yang di-pop :” << A[0];
char temp=A[0];
for (int i=0;i<banyak; i++) A[i] = A[i+1];
A[banyak]= ‘0’;
banyak–;
return temp;
}

int main(int argc, char *argv[])
{
Stack stack;
for (char c=’a’; c<‘d’; c++){
stack.push(c);
stack.cetak();
}
char p = stack.pop();
stack.cetak();
cout << “\n\nCetak pakai overloading : ” << stack;
system(“PAUSE”);
return EXIT_SUCCESS;
}