FAQ example wont work!

This is a discussion on FAQ example wont work! within the C++ Programming forums, part of the General Programming Boards category; ok...i go to: "FAQ > How do I... (Level 2) > Multiple source files for one program (C++ example)" im ...

  1. #1
    Useless Apprentice ryan_germain's Avatar
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    FAQ example wont work!

    ok...i go to: "FAQ > How do I... (Level 2) > Multiple source files for one program (C++ example)"

    im using dev-c++, can compile other single .cpp files perfectly fine. But...I cant get this program to run. It says:

    program2.cpp: undefined reference to `myFunc(int &)'
    program2.cpp: undefined reference to `MyClass::setData(int)'
    program2.cpp: undefined reference to `MyClass::getData(void)'

    in the linker output when i try to compile program2. I copy pasted the code.

    Ive never worked on header files before (hence why im trying this program) so maybe im just doing something wrong there.

    What the hell am i doing wrong?

  2. #2
    C++ Developer XSquared's Avatar
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    So you created a new project, and all of the cpp and h files are included?
    Naturally I didn't feel inspired enough to read all the links for you, since I already slaved away for long hours under a blistering sun pressing the search button after typing four whole words! - Quzah

    You. Fetch me my copy of the Wall Street Journal. You two, fight to the death - Stewie

  3. #3
    Useless Apprentice ryan_germain's Avatar
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    yeah exactly, all of them. You compile .h files eh? (i SAID i was a noob with headers)

  4. #4
    Useless Apprentice ryan_germain's Avatar
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    cause when i try to compile any .h file the linker output conplains about:

    gcc: Compilation of header file requested
    gcc: file path prefix `C:\DEV-C_~1\Bin\' never used

    so i dunno...are you supposed to compile .h files? if so, why does this error occur?
    Thx

  5. #5
    & the hat of GPL slaying Thantos's Avatar
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    No you do not compile header files

  6. #6
    Useless Apprentice ryan_germain's Avatar
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    Quote Originally Posted by XSquared
    So you created a new project, and all of the cpp and h files are included?
    why must the files be in a project? I know it wont work if they're not, but is there a reasoning behind this?

  7. #7
    C++ Developer XSquared's Avatar
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    Otherwise it won't know to link the object files together.
    Naturally I didn't feel inspired enough to read all the links for you, since I already slaved away for long hours under a blistering sun pressing the search button after typing four whole words! - Quzah

    You. Fetch me my copy of the Wall Street Journal. You two, fight to the death - Stewie

  8. #8
    Useless Apprentice ryan_germain's Avatar
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    Thx for all the help...it works now

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