// demonstrates basic pointer use
// Michael L. Collard
// 11/2/99

int main(){
  
  int n = 1;   // create a variable with 5 in int
  
  int* p = &n; // creates a pointer that points to n

  n = 2;// change value of n using n

  *p = 3;// change value of n through p (dereferencing)

  int m = 4; // another variable m

  p = &m; // now points to m

  *p = 5; // change m

  // note that * at declaration is not a dereference
  // opeartor, rather it is a way of telling the compiler
  // we are declearing a pointer
  int *p2 = p;  // declare pointer and assign it
  // an address of m

  *p2 = 6; // change m

  p=&n;// p now points to n again

  *p=*p2;// the value of m is assigned to n
}