Adt lab/pointers

This is part of adt lab.

Pointers

In C/C++, there is a special kind of types: pointers. Pointer variables keep locations in the memory. To declare a pointer variable, we use symbol *:

type* variable;

For example, the following code declares p as a pointer to an integer.

  int* p;

To see how pointers work, let's follow this code.

  int a = 10;
  int b = 20;
  p = &a;
  cout << (*p) << endl;

  *p = 100;
  cout << a << endl;

  a++;
  cout << (*p) << endl;

  p = &b;
  a = *p;
  cout << a << endl;