Call another cpp file

Posts 1–15 of 16 · Page 1 of 2

For example, I got the main.cpp , when the main() is finish i want to call the joke.cpp how do i do that?

Use header files..Buddy

you can make your functions inside your header files, then call them in your main function in main.cpp.

Code:

//joke.h (Header file)
#ifndef JOKE_H
#define JOKE_H
#endif

void someFunction(int someParam); //The full function is stored in joke.cpp

Code:

//main.cpp
#include "joke.h"

int main()
{
    someFunction(22);
    return 0;
}

Originally Posted by master131

Code:

//joke.h (Header file) #ifndef JOKE_H #define JOKE_H #endif void someFunction(int someParam); //The full function is stored in joke.cpp

Code:

//main.cpp #include "joke.h" int main() { someFunction(22); return 0; }

Yeah that works, But i still trying to understand for what is others cpp files..why would i add them? Its not like vb or c# that you can make form2.show()...I dont understand it..I can just add new functions on the main.cpp idk..

Originally Posted by Lyoto Machida

Yeah that works, But i still trying to understand for what is others cpp files..why would i add them? Its not like vb or c# that you can make form2.show()...I dont understand it..I can just add new functions on the main.cpp idk..

Its Called OOP..
Once you get deep into c++ its all about OOP (Object-oriented programming - Wikipedia, the free encyclopediaⓘ )

Like say you got a whole bunch of Directx shit in your project & a whole bunch of other shit
You dont wanna cluster all that into one cpp file. So ya do this

[Highlight=cpp]
//Directx shit header

#pragma once

class Directx{
public:

void DrawSomething();
};
extern Directx D3D;

[/Highlight]

[Highlight=cpp]
// Directx CPP File

#include "Directx.h"

Directx D3D;

void Directx:

rawSomething()
{
//Render shit
}

[/Highlight]

[Highlight=cpp]
//Main CPP

#include "Directx.h"

int main()
{
D3D.DrawSomething();
}

[/Highlight]

Do you kinda get what im saying ?

Originally Posted by whit

Its Called OOP..
Once you get deep into c++ its all about OOP (Object-oriented programming - Wikipedia, the free encyclopediaⓘ )

Like say you got a whole bunch of Directx shit in your project & a whole bunch of other shit
You dont wanna cluster all that into one cpp file. So ya do this

[Highlight=cpp]
//Directx shit header

#pragma once

class Directx{
public:

void DrawSomething();
};
extern Directx D3D;

[/Highlight]

[Highlight=cpp]
// Directx CPP File

#include "Directx.h"

Directx D3D;

void Directx:rawSomething()
{
//Render shit
}

[/Highlight]

[Highlight=cpp]
//Main CPP

#include "Directx.h"

int main()
{
D3D.DrawSomething();
}

[/Highlight]

Do you kinda get what im saying ?

hmm i think i get it..thank you all
/request close

Originally Posted by master131

Code:

//joke.h (Header file)
#ifndef JOKE_H
#define JOKE_H
#endif

void someFunction(int someParam); //The full function is stored in joke.cpp

Improper header guard.

Originally Posted by whit

Its Called OOP..
Once you get deep into c++ its all about OOP (Object-oriented programming - Wikipedia, the free encyclopedia )

Incorrect. C++ is a multi-paradigm language. Ex: STL is not OOP.

Originally Posted by whit

Code:

extern Directx D3D;

Avoid global state. Instantiate the object within main. If it must be global, use the singleton pattern.

Originally Posted by Fovea

Improper header guard.

Incorrect. C++ is a multi-paradigm language. Ex: STL is not OOP.

Avoid global state. Instantiate the object within main. If it must be global, use the singleton pattern.

Get off me, I was doing it in a rush.

Code:

//joke.h (Header file)
#ifndef JOKE_H
#define JOKE_H
void someFunction(int someParam); //The full function is stored in joke.cpp
#endif

Better?

Originally Posted by Lyoto Machida

Is this what you're asking if you can do?

Code:

#include <iostream>

using namespace std;
void joke();

int main()
{
    cout << "Hello world!" << endl;
    joke();
    return 0;

void joke()
{
    cout << "Lol Funny Joke" << endl;
}
}

Originally Posted by cfsharp

Is this what you're asking if you can do?

Code:

#include <iostream>

using namespace std;
void joke();

int main()
{
    cout << "Hello world!" << endl;
    joke();
    return 0;

void joke()
{
    cout << "Lol Funny Joke" << endl;
}
}

Syntax error..Tsk Tsk

Originally Posted by whit

Syntax error..Tsk Tsk

Oops didn't mean to put that in main lol, i rushed it D:

It might be beccause you want to reuse some other cpp files from a previous project or to stop cluttering 1 file with a whole bunch of code that can be used again.

You don't "call a CPP file" - a cpp file only contains function definitions (and their bodies, and variables).

You must call a function inside the CPP file. The easiest way to do this is to use the C header file and declare a function which your CPP file has, and call it O:

Brainfuck.

You use multiple cpp files to keep your code organized. It'd be hard to find what you want in a 100k line project if it's all in a single cpp file

Posts 1–15 of 16 · Page 1 of 2

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