creating libraries for c++

This is a discussion on creating libraries for c++ within the C++ Programming forums, part of the General Programming Boards category; does anyone know of any tutorials etc for creating and using your own header files?...

  1. #1
    Sir Mister Insane Sako Klinerr1's Avatar
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    creating libraries for c++

    does anyone know of any tutorials etc for creating and using your own header files?
    Email: Klinerr1@nc.rr.com || AIM: MisterSako || MSN: sakotheinsane@hotmail.com

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  2. #2
    x4000 Ruski's Avatar
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    Make New Unit (in dev) and write whatever you want in it .. Then rename it into hello.h and in your application put #include "hello.h" (It has to be added to the project first)
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  3. #3
    Sir Mister Insane Sako Klinerr1's Avatar
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    yes i know that. but how would i call to it. or would it be like if i had a header file i made including tons of variables, it would be like the varibales were writtin into my main .cpp document?
    Email: Klinerr1@nc.rr.com || AIM: MisterSako || MSN: sakotheinsane@hotmail.com

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  4. #4
    x4000 Ruski's Avatar
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    If you've got a function in your header file call it this way:
    function() .. just like all other ones
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  5. #5
    x4000 Ruski's Avatar
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    The only difference is that you dont make #include <file.h> put with quotes (") like #include "file.h"
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    Originally posted by Klinerr1
    yes i know that. but how would i call to it. or would it be like if i had a header file i made including tons of variables, it would be like the varibales were writtin into my main .cpp document?
    Yep, thats pretty much how it goes. When you start including that same header in multiple files though, if you want them to use the see same variables you will need to use the extern keyword. If you want a simple example of a single header suited for a single cpp here goes..any questions on part of it, just ask.

    Code:
    #ifndef VECTOR_H
    #define VECTOR_H
    
    typedef struct _tagVector
    {
      float x;
      float y;
      float z;
    }Vector3;
    
    #endif /* VECTOR_H */

  7. #7
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    uhh that is not a library file, that is a header file.

    In visual C++ in the new project menu, you choose Static Linked Library and write your code, hit the build button and voila you have a library.
    "There are three kinds of people in the world...
    Those that can count and those that can't."

  8. #8
    Sir Mister Insane Sako Klinerr1's Avatar
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    wut im trying to do is put my intro for a game in a seperatefile. because its like 500 lines down. i want the intro to play before the game so would i pretend intro.h or wutever is a function and call it as if the function was named intro.h
    Email: Klinerr1@nc.rr.com || AIM: MisterSako || MSN: sakotheinsane@hotmail.com

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  9. #9
    x4000 Ruski's Avatar
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    Call it like all other functions but #include "intro.h" in main.cpp
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  10. #10
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    why not put it in another .cpp file, and add it to your project, and prototype it in main.cpp (or whatever your main file is called)
    "There are three kinds of people in the world...
    Those that can count and those that can't."

  11. #11
    Sir Mister Insane Sako Klinerr1's Avatar
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    oh stupid me
    Email: Klinerr1@nc.rr.com || AIM: MisterSako || MSN: sakotheinsane@hotmail.com

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  12. #12
    x4000 Ruski's Avatar
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    You're just starting
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  13. #13
    Sir Mister Insane Sako Klinerr1's Avatar
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    so is this right (im not usign my intro ni the header)
    PHP Code:
    #include <iostream>
    #include <string> 
    #include <stdlib.h> 
    #include <windows.h>
    #include <conio.h>
    #include <fstream>
    #include "menuscreen_.cpp"
    using namespace std;

    int menuscreen_.cpp();
    char menuscreenv;
    int goldhealthmagicattackaimdefenceynvaricharactertype;
    string empty, weaponshieldarmorszWordszLineplayeritem1item2item3item4item5item6item7item8item9item10item11item12item13item14item15item16item17item18item19item20item21item22item23item24item25item26item27item28item29item30;
    bool menuselect;

    int main(int argcchar *argv[])
    {
    int menuscreen_.cpp();
    cin.get();
    return 
    0;

    menuscreen_.cpp looks like this
    PHP Code:
    #include <iostream>
    #include <string> 
    #include <stdlib.h> 
    #include <windows.h>
    #include <conio.h>
    #include <fstream>

    int main(int argcchar *argv[])
    {
    cout << menuscreenv << endl;
    cin >> menuselect;
    if (
    menuscreen == 1){
    }
    else if (
    menuscreen == 2){
    ofstream fout;
        
    fout.open("stats.sav");
        
    fout << "Player: " << player << " ";
        
    fout << "CharacterType: " << charactertype << " ";
         
    fout << "Health: " << health << " ";
        
    fout << "Gold: "   << gold   << " ";
        
    fout << "Magic: "  << magic   << " ";
        
    fout << "Attack: " << attack   << " ";
        
    fout << "Aim: "    << aim   << " ";
        
    fout << "Defence: "<< defence   << " ";
        
    fout << "Weapon: "   << weapon << " ";
        
    fout << "Shield: "   << shield << " ";
        
    fout << "Armor: "   << armor << " ";
        
    fout << "Item1: " << item1 << " ";
        
    fout << "Item2: " << item2 << " ";
        
    fout << "Item3: " << item3 << " ";
        
    fout << "Item4: " << item4 << " ";
        
    fout << "Item5: " << item5 << " ";
        
    fout << "Item6: " << item6 << " ";
        
    fout << "Item7: " << item7 << " ";
        
    fout << "Item8: " << item8 << " ";
        
    fout << "Item9: " << item9 << " ";
        
    fout << "Item10: " << item10 << " ";
        
    fout << "Item11: " << item11 << " ";
        
    fout << "Item12: " << item12 << " ";
        
    fout << "Item13: " << item13 << " ";
        
    fout << "Item14: " << item14 << " ";
        
    fout << "Item15: " << item15 << " ";
        
    fout << "Item16: " << item16 << " ";
        
    fout << "Item17: " << item17 << " ";
        
    fout << "Item18: " << item18 << " ";
        
    fout << "Item19: " << item19 << " ";
        
    fout << "Item20: " << item20 << " ";
        
    fout << "Item21: " << item21 << " ";
        
    fout << "Item22: " << item22 << " ";
        
    fout << "Item23: " << item23 << " ";
        
    fout << "Item24: " << item24 << " ";
        
    fout << "Item25: " << item25 << " ";
        
    fout << "Item26: " << item26 << " ";
        
    fout << "Item27: " << item27 << " ";
        
    fout << "Item28: " << item28 << " ";
        
    fout << "Item29: " << item29 << " ";
        
    fout << "Item30: " << item30 << " ";
            
    fout.close();
    }
    else if (
    menuscreen == 3){
    }
    else if (
    menuscreen == 4){
    }
    else if (
    menuscreen == 5){
    }

    do i have to do anything if i want to use the same variables in both files? and have it so both variables hold the same data?
    Email: Klinerr1@nc.rr.com || AIM: MisterSako || MSN: sakotheinsane@hotmail.com

    -the shroom has spoken

  14. #14
    Banned frenchfry164's Avatar
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    no, you don't have to include .cpp files. I don't even think that would compile. Just add the other .cpp file to your project, and any variables you need from it, put an extern at the top of the main source file for them. And any functions, just prototype them like you regularly would.

  15. #15
    Sir Mister Insane Sako Klinerr1's Avatar
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    extern?and i need it so the cpp fies read variables from the main.cpp file.
    Email: Klinerr1@nc.rr.com || AIM: MisterSako || MSN: sakotheinsane@hotmail.com

    -the shroom has spoken

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