C++ and C

**kiros88** · 09-13-2010

I was wondering can i have a .cpp file like

Code:

#include "gsh.h"
#include <string.h>

char* getStringhere(){
	char * str1 = "here I finished libMIDS.a";
	return str1;
}

as gsh.cpp
then a header gsh.h with just

char* getStringhere();

as my only line in it.

cuz i have a .c file thats has the main and i call getStringhere(); and it doesnt work says its undefined reference but i have the header in my .c file

**bithub** · 09-13-2010

It sounds like you are compiling incorrectly. You need to compile gsh.cpp into an object file, then link that to your main object file to produce an executable. What compiler are you using?

**kiros88** · 09-13-2010

Yea basically i was wondering about that because It worked completely fine doing it in C with the.h just having one line
char* getStringhere()
but i was wondering since i changed the file into a .cpp file would i have to doo all this object creating situation when i figured couldnt the header file just be a funciton

**Elysia** · 09-14-2010

Make it

Code:

extern "C" const char* GetStringHere()
{
    return "here I finished libMIDS.a";
}

This will ensure that C code can interface with it.

**iMalc** · 09-14-2010

You should also learn about header include guards

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