How to call on a function found on another file?

c++, identifier, sfml

Solution

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 <SFML/Graphics.hpp>

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 <SFML/Graphics.hpp>
#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 <SFML/Graphics.hpp>
// #include "player.cpp"


int playerSprite();  // Here

int main()
{
    // ...   
    int p = playerSprite();  
    //...

Problem

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 <SFML/Graphics.hpp> #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 <SFML/Graphics.hpp> 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.

Original source