Is it possible to import functions in c++? [closed]

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I have two programs given below in two separate files in c++.

File A.cpp

void name(){
cin>>name;
}

File B.cpp

void age(){
cin>>age;
}

Now, I need to use the function name in file B. Can I do it without rewriting the entire function (name) in file B.cpp? Can I import functions in C++, just like you do in other languages, such as JavaScript?

Can we declare functions in .h files in c++? I am sorry, but I am new to c++, so I don't have much idea about it? Can you please explain your answer? — Insignificant_guy
– Insignificant_guy, Commented Dec 2, 2020 at 21:31
Yes, you can declare functions in a header file. All declarations should go there unless you want them to be "private". Sounds like you could use a good C++ book — NathanOliver
– NathanOliver, Commented Dec 2, 2020 at 21:32
I would look at the answer provided in this post. stackoverflow.com/questions/25274312/… — boogachamp
– boogachamp, Commented Dec 2, 2020 at 21:35

Remy Lebeau · Accepted Answer · 2020-12-02 22:56:16Z

1

Create a header file containing a declaration for the name() function, and then you can #include that header in any source file that needs to access name(), eg:

A.h

#ifndef A_H
#define A_H

void name();

#endif

A.cpp

#include "A.h"

void name(){
    ...
}

B.cpp

#include "A.h"

void age(){
    ...
    name();
    ...
}

answered Dec 2, 2020 at 22:56

Remy Lebeau

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1 Comment

datenwolf Over a year ago

Maybe add to the answer, that all .cpp files must be compiled independently, and in a final step linked together into a executable binary.

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