How to call on a function found on another file

Question

I m recently starting to pick up C   and the SFML library  and I was wondering if I defined a Sprite on a file appropriately called  player cpp  how would I call it on my main loop located at  main cpp    Here is my code  Be aware that this is SFML 2 0  not 1 6     main cpp   include  stdafx h   include  lt SFML Graphics hpp gt   include  player cpp   int main         sf  RenderWindow window sf  VideoMode 800  600    Skylords - Alpha v1         while  window isOpen                  sf  Event event          while  window pollEvent event                         if  event type    sf  Event  Closed                  window close                       window clear            window draw            window display               return 0      player cpp   include  stdafx h   include  lt SFML Graphics hpp gt   int playerSprite        sf  Texture Texture      if  Texture loadFromFile  player png             return 1            sf  Sprite Sprite      Sprite setTexture Texture       return 0      Where I need help is in the main cpp where it says window draw    in my draw code  In that parenthesis  there should be the name of the Sprite that I want to load onto the screen  As far as I ve searched  and tried by guessing  I have not succeeded into making that draw function work with my sprite on the other file  I feel like I m missing something big  and very obvious  on either files   but then again  every pro was once a newb

User · Answer

Your sprite is created mid way through the playerSprite function... it also goes out of scope and ceases to exist at the end of that same function. The sprite must be created where you can pass it to playerSprite to initialize it and also where you can pass it to your draw function.

Perhaps declare it above your first while?

User · Answer

Small addition to  user995502 s answer on how to run the program  g   player cpp main cpp -o main out  amp  amp    main out

User · Answer

You can use header files    Good practice   You can create a file called player h declare all functions that are need by other cpp files in that header file and include it when needed    player h   ifndef PLAYER H       To make sure you don t declare the function more than once by including the header multiple times   define PLAYER H   include  stdafx h   include  lt SFML Graphics hpp gt   int playerSprite      endif   player cpp   include  player h      player h must be in the current directory  or use relative or absolute path to it  e g  include  include player h   int playerSprite        sf  Texture Texture      if  Texture loadFromFile  player png             return 1            sf  Sprite Sprite      Sprite setTexture Texture       return 0      main cpp   include  stdafx h   include  lt SFML Graphics hpp gt   include  player h               Here  Again player h must be in the current directory  or use relative or absolute path to it   int main                    int p   playerSprite                    Not such a good practice but works for small projects  declare your function in main cpp   include  stdafx h   include  lt SFML Graphics hpp gt      include  player cpp    int playerSprite        Here  int main                       int p   playerSprite

[c++] How to call on a function found on another file?

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