Pointer question

This is a discussion on Pointer question within the C++ Programming forums, part of the General Programming Boards category; Hi, I'm a bit confused on this pointer question, can anyone shed some light on this? Please and thank you ...

  1. #1
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    Pointer question

    Hi, I'm a bit confused on this pointer question, can anyone shed some light on this?
    Please and thank you

    Code:
    int main()
    {
          int x = 10;
          int *p;
          p = &x;
          cout << p << endl; //should get address of x
          cout << &x << endl; //address of x
          cout << *(&x) << endl; //10
          cout << &p << endl; //<--- this is the address of p
          cout << *(&p) << endl; //address of x , but why is this the address of x??
          system("PAUSE");
          return 0;
    }

  2. #2
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    Code:
    *(&p) == p == &x
    bit∙hub [bit-huhb] n. A source and destination for information.

  3. #3
    C++まいる!Cをこわせ! Elysia's Avatar
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    &p -> get the address of the pointer p, hence making a pointer to the pointer.
    *(&p) -> dereference that pointer to the pointer p, getting back the original pointer p.
    Quote Originally Posted by Adak View Post
    io.h certainly IS included in some modern compilers. It is no longer part of the standard for C, but it is nevertheless, included in the very latest Pelles C versions.
    Quote Originally Posted by Salem View Post
    You mean it's included as a crutch to help ancient programmers limp along without them having to relearn too much.

    Outside of your DOS world, your header file is meaningless.

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