In this example for the C++ Documentation Tutorial, why are the pointers declared twice? -

i'm working through c++ documentation tutorial, , i'm having trouble understanding example of using pointers in constructor:

// example on constructors , destructors #include <iostream> using namespace std;  class crectangle {     int *width, *height;   public:     crectangle (int,int);     ~crectangle ();     int area () {return (*width * *height);} };  crectangle::crectangle (int a, int b) {   width = new int;   height = new int;   *width = a;   *height = b; }  crectangle::~crectangle () {   delete width;   delete height; }  int main () {   crectangle rect (3,4), rectb (5,6);   cout << "rect area: " << rect.area() << endl;   cout << "rectb area: " << rectb.area() << endl;   return 0; } 

it seems pointer *width declared twice. declared @ beginning of class: int *width, *height;, , declared when constructor initialized width = new int;.

why necessary declare pointer twice?

1) width = new int;

 not declaration. allocating memory , assigning width.  

2) int *with -> declaration.

hope helps.