Quick Question

This is a discussion on Quick Question within the C++ Programming forums, part of the General Programming Boards category; when you create functions in different files, it's a good idea to DECLARE the function prototype in a header file, ...

  1. #16
    Registered User
    Join Date
    Dec 2001
    Posts
    421
    when you create functions in different files, it's a good idea to DECLARE the function prototype in a header file, and DEFINE the function in a CPP. Only include header files.

    eg:

    Code:
    main.cpp---
    #include "myheader.h"
    
    int main(void)
    {
       MyFunc();
       return(0);
    }
    
    myheader.h---
    
    #ifndef MYHEADER_H
    #define MYHEADER_H
    
    int MyFunc(void);
    
    #endif // MYHEADER_H
    
    myheader.cpp---
    
    #include "myheader.h"
    #include <iostream>
    using namespace std;
    
    int MyFunc(void)
    {
       cout << "MyFunc\n";
       return(1);
    }
    doing this will prevent you from having problems with things being defined multiple times. The only functions that you should define a body for in header files are inline functions.

    hope this helps
    U.
    Quidquid latine dictum sit, altum sonatur.
    Whatever is said in Latin sounds profound.

  2. #17
    Registered User
    Join Date
    Apr 2002
    Posts
    99

    Got it.

    Ok thanks, I'll remember that from now on.

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