Contoh Program Pointer

Bahasa Pemrograman C++

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Operator Deference (&).

#include <iostream>
using namespace std;
int main(){

int a = 5;

cout<<"Alamat Variabel a adalah :"<<&a<<endl;

cout<<"Nilai Variabel a adalah :"<<a<<endl;

return 0;

}

Operator Reference (*).

#include <iostream>

using namespace std;

int main(){

int a=5; //Memberikan nilai 5 pada variabel a

int *b; //Mendeklarasikan variabel b sebagai pointer

b = &a; //Mengkopikan alamat variabel a kedalam variabel pointer b

cout<<"Nilai variabel a adalah "<<a<<endl;

cout<<"Alamat variabel a adalah "<<&a<<endl;

cout<<"Isi dari variabel b adalah "<<b<<endl;

cout<<"Nilai yang tertampung dalam variabel b adalah "<<*b<<endl;

return 0;

}

Mendeklarasikan Variabel Pointer.

#include <iostream>

using namespace std;

int main() {

int x, y;

int *px;

x = 89;

y = x;

px = &x;

cout << "Nilai x = " << x << endl;

cout << "Nilai y = " << y << endl;

cout << "Alamat x = " << &x << endl;

cout << "Alamat px = " << px << endl;

cout << "Nilai px = " << *px << endl;

x = 108;

cout << "\nNilai x = " << x << endl;

cout << "Nilai y = " << y << endl;

cout << "Alamat x = " << &x << endl;

cout << "Alamat px = " << px << endl;

cout << "Nilai px = " << *px << endl;

*px = 123;

cout << "\nNilai x = " << x << endl;

cout << "Nilai y = " << y << endl;

cout << "Alamat x = " << &x << endl;

cout << "Alamat px = " << px << endl;

cout << "Nilai px = " << *px << endl;

}

Pointer pada Pointer.

#include <iostream>

using namespace std;

int main() {

int x;

int *px; //pointer ke variabel

int **ppx; //pointer ke pointer

x = 175;

px = &x;

ppx = &px;

cout << "Nilai x = " << x << endl;

cout << "Nilai px = " <<*px<<endl;

cout << "Nilai ppx = "<<**ppx<<endl;

return 0;

}

Pointer pada Array 

#include <iostream>

#define MAX 5

using namespace std;

int main() {

int a[MAX];

int *pa; pa = a; //atau pa = &a[0]

for (int i = 0; i < MAX; i++) {

cout << "Masukkan Nilai "<<i+1<<":";

cin >> a[i];

}

cout << endl;

for (int i = 0; i < MAX; i++) {

cout << "Nilai a["<<i<<"]="<<*pa<<endl;

pa++;

}

}

Pointer pada String #1

#include <iostream>

#define MAX 5

using namespace std;

int main() {

char nama[] = "Albert Einstein";

char *pNama = nama;

cout << "Nama = " << nama << endl;

cout << "pNama = " << pNama << endl;

pNama += 7; cout <<"\nSetelah pNama += 7"<<

endl;

cout << "Nama = " << nama << endl;

cout << "pNama = " << pNama << endl;

}

Pointer pada String #2

#include <iostream>

#define MAX 5

using namespace std;

int main() {

int x[10] = {0,1,2,3,4,5,6,7,8,9};

int *px;

int i;

for(i=0; i<10; i++)

{

px = &x[i]; //membaca alamat dari x

cout<<x[i]<<" "<<*px<<" "<<px<<endl;

}

}