Menggeser ke kiri elemen array

#include <cstdlib>
#include <iostream>
#define maks5
/* run this program using the console pauser or add your own getch, system("pause") or input loop */
using namespace std;

class array{
friend ostream& operator<<(ostream&, const array&);
friend istream& operator>>(istream&, array&);
public:
array();
void cetak();
void geser_kiri();

private:
char a[5];
int posisi;
};

array::array(){
for(int i=0;i<5;i++)
a[i]='O';
}

void array::cetak(){
for(int i=0;i<5;i++)
cout<<a[i]<<" ";
}

ostream& operator<<(ostream& out, const array& keluar){
for(int i=0;i<5;i++)
out<<keluar.a[i]<<" ";
out<<endl;
return out;
}

istream& operator>>(istream& in, array& masuk){
int posisi;
for (int posisi=1; posisi<=5; posisi++){
cout<<"masukkan nilai array posisi ke-"<<posisi<<"= ";

if(posisi >= 0 && posisi <= 5){
in>>masuk.a[posisi-1];
}
}
return in;
}

void array::geser_kiri(){
int n=5;
int temp=a[0];
for(int i=0;i<n;i++)
a[i]=a[i+1];
a[n-1]=temp;
}

int main(int argc, char** argv){
array X;
cout<<"Array masih kosong : "<<X;
cin>>X;

cout<<endl<<"<Isi Array saat ini : "<<X;
X.geser_kiri();
cout<<"Isi Array setelah di geser kiri : "<<X;

system("PAUSE");
return EXIT_SUCCESS;
}