how to include a function from another file

[award982]

Hello,
i was wondering how do you include a function from another file to the main file, something like this

#include <DrawLine.cpp> 

and then lets say the function i need is called DrawLine(); from the file DrawLine.cpp, and i need to use it like this:

#include <DrawLine.cpp>
using namespace sdt;
int main()

{

//blah blah blah
DrawLine();

}

I hope i wrote clear enough, im a total newb lolz

[writetonsharma]

in header declare the function. in .cpp file define the function.
and then include the .h file and not .cpp file.

//Drawline.h
void DrawLine();

//Drawline.cpp
void DrawLine()
{

//implementation
}

//main.cpp

#include "Drawline.h"
int main()
{
DrawLine();

return 0;
}

[award982]

so you need 2 files for this to work? and how to you make the .h files? simply rename the .cpp extension? and dev-cp will recognize it? lolz, didnt knew.
0h, and abit of topic, what would be the difference between

void LineDraw()
and
int LineDraw()

?


EDIT: i tried how you said, i created a DrawLine().h file containing int DrawLine();
then i created the DrawLine().cpp file containing:

#include <cstdlib>
#include <iostream>

using namespace std;

int DrawLine ()   // this is the line drawing function
{
    const int Length = 80;  //change accordingly
    
    for (int i = 0; i < Lenght; i++)    // loop
    
          cout << "*" << endl;     
    
}

and the main file containing :

#include <cstdlib>
#include <iostream>
#include "DrawLine().h"

using namespace std;

int main(int argc, char *argv[])
{
    DrawLine();
    
    
    
    system("PAUSE");
    return EXIT_SUCCESS;
}

so i opened all 3 files in devcpp on one window (different tabs) and all of them are in the same folder, and when compiling this error comes:

[Linker error] undefined regerence to `DrawLine()'
id returned 1 exit status
[Build Error [Project1.exe] Error 1

[writetonsharma]

simply rename the .cpp extension? and dev-cp will recognize it

yes.

0h, and abit of topic, what would be the difference between

void LineDraw()
and
int LineDraw()

the first one will not return anything
second one will return an int. thats it.


create DrawLine.h and DrawLine.cpp and not DrawLine().h

File one will be

//DrawLine.h
int DrawLine();

file second:

//DrawLine.cpp
#include <cstdlib>
#include <iostream>
#include "DrawLine.h"

using namespace std;

int DrawLine ()   // this is the line drawing function
{
    const int Length = 80;  //change accordingly
    
    for (int i = 0; i < Lenght; i++)    // loop
    
          cout << "*" << endl;    
    
}

Third file:

//main.cpp
#include <cstdlib>
#include <iostream>
#include "DrawLine.h"

using namespace std;

int main(int argc, char *argv[])
{
    DrawLine();    
    
    
    system("PAUSE");
    return EXIT_SUCCESS;
}