Importing code from another .cpp file

[Bhavesh Sangwan]

Hi All...!

I'm using Eclipse IDE and MinGW compiler and have added two .cpp files in my C++ project.

One file having main() method and snother without main() - only one method - display(int, int).

Now I want use that display() function written in MyFile_2.cpp into main() function of MFile_1.cpp file. So please help me how to use some code from another .cpp file.

My files are listed below...

MyFile_2.cpp

# include <iostream>
using namespace std;
void add(int a,int b){
	int c = a+b;
	cout<<"Sum is :"<<c<<endl;
}

MyFile_1.cpp

# include <iostream>
using namespace std;
int main(){
	cout <<"My Name is Khan...!"<<endl;
	cout <<"And I'm not a terrerist";
	add(12,13);                      // how to call this function 
	return 0;
}

Please correct me...

[Henry Wong]

Bhavesh Sangwan wrote:Hi All...!

I'm using Eclipse IDE and MinGW compiler and have added two .cpp files in my C++ project.

One file having main() method and snother without main() - only one method - display(int, int).

Now I want use that display() function written in MyFile_2.cpp into main() function of MFile_1.cpp file. So please help me how to use some code from another .cpp file.

Please correct me...

Isn't that what the include files are for? You will need to have an include file that defines the display function, and include that file into your other c++ source file.

Henry

[Jesper de Jong]

Create a header file with the declaration (not the definition) of the add function:

// Save this as, for example, add.h
void add(int a, int b);

Then include that header file in your MyFile_1.cpp:

#include <iostream>
#include "add.h"

using namespace std;

int main() {
    // ...
	return 0;
}

[Yashwanth Raj]

sir i have a doubt.you have used <>for including iostream and "" for including a user defined header.what are their difference

[Jesper de Jong]

<> is for including system header files, "" for including your own header files.

See What is the difference between #include <filename> and #include “filename”?