Thread: Function pointers

  1. #1

    Function pointers

    I have a C++ class -- CUtility. I made an instance of the class, Utility. All the tutorials on function pointer I've read require you use static functions, but I need to use a non-static function from the instance of my CUtility class. How can I do this?

  2. #2
    Registered User Casey's Avatar
    Join Date
    Jun 2003
    The only difference between a static and nonstatic function is that a static function only has file scope. A nonstatic (external) function can be seen by other files. There's absolutely nothing wrong with using an external function as the address for a function pointer.

  3. #3
    Registered User
    Join Date
    May 2003
    class CUtility
      void setNum(int i) { num = i; } 
      int num;
    typedef void (CUtility::*pointerToMember)(int);
    int main()
      pointerToMember func = &CUtility::setNum;
      CUtility utility;
      return 0;

  4. #4
    I did that and got this (MSVC++ 6)

    H:\JOSH'S MY DOCUMENTS\Simple 3D Engine\engine.cpp(59) : fatal error C1001: INTERNAL COMPILER ERROR
            (compiler file 'msc1.cpp', line 1786) 
             Please choose the Technical Support command on the Visual C++ 
             Help menu, or open the Technical Support help file for more information

  5. #5
    Registered User
    Join Date
    May 2003
    Hrm, I just compiled this on both gcc 3.2 and MSVC6. You may need to upgrade to SP5.

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