.c works but .cpp doesnt??

BlitzMax Forums/BlitzMax Programming/.c works but .cpp doesnt??

slenkar

(Posted 2010) [#1]

i tried to do a hello world in C++ which worked when the file was called keefy.c but didnt work when it was called keefy.cpp

it said 'undefined reference to Say'

here are the sources:
keefy.cpp

#include <stdio.h>

void Say(char *str)
{
printf(str);
}

keefy.c

#include <stdio.h>



void Say(char *str)
{
printf(str);
}

testc.bmx

Import "keefy.cpp"

Extern
Function Say(str:Byte Ptr)
EndExtern

Say ("hello".toCstring())

bruZard

(Posted 2010) [#2]

"void Say(char *str)"

try

"void Say(const char* str)"

dawlane

(Posted 2010) [#3]

Try this

#include <stdio.h>

extern "C" void Say(char *str); // It says this somewhere in the BlitzMAX Docs about using the extern keyword with c++
void Say(char *str)
{
printf(str);
}

slenkar

(Posted 2010) [#4]

oh yeah it was extern "C" thanks

how do you do it 'the other way around'?

I want to call a blitz function in a .cpp file

it works in C but not in CPP

GW	(Posted 2010) [#5]

Look in the bmax generated assembly file for the properly named function.

slenkar

(Posted 2010) [#6]

i got it to work now thanks

Czar Flavius

(Posted 2010) [#7]

Don't mix C++ and Blitz on your own if you can avoid it. It will give you a headache.

Brucey

(Posted 2010) [#8]

Don't mix C++ and Blitz on your own if you can avoid it. It will give you a headache.

How so?

Czar Flavius

(Posted 2010) [#9]

I'm not talking about wrapping useful C++ code to be used in Blitz :P