int *p; int *q; // this is how pointers are declared
int a[5];
int x = 10, y;

 p = &x;      // p now points to x
*p = 20;      // whatever p points to is now equal to 20
 y = *p;      // y is now equal to whatever p points to
 p = &a[2];   // p points to an element of array a[]
 q = p;       // q and p now point to the same thing