Integration of CPP with Objective C

Question

I want to call a CPP function from Objective C. I have written the function in CPP. I have tried to call the CPP function from test.mm file, but I am getting following error message.

error: 'functionName' was not declared in this scope

I have written the function 'functionName' in testCPP.cpp & testCPP.h

Please help me to resolve it.

//Objective-C (.mm)
#import "MergeAudios.h"
#import "MergeAudioFiles.h" // cpp header file

@implementation MergeAudios

-(void)mergeAudioFile1:(CFURLRef)path1 file2:(CFURLRef)path2 withFile:(CFURLRef)path3{
    CombineAudioFiles(path1, path2, path3);
}

@end
// CPP (.cpp)

void CombineAudioFiles(CFURLRef sourceURL1, CFURLRef sourceURL2, CFURLRef destinationURL) 
{
......
......
}

Yes, but is there a declaration for CombineAudioFiles in MergeAudioFiles.h? If we can't see the code, we can't help. — Tom Dalling
– Tom Dalling, Commented Nov 22, 2010 at 13:57
Sorry, In my .cpp file, having 3 methods. I did not declare 'CombineAudioFiles' in .h file. Thank you so much. — jfalexvijay
– jfalexvijay, Commented Nov 22, 2010 at 14:01

Tom Dalling · Accepted Answer · 2010-11-22 14:02:42Z

1

~~Did you #include "testCPP.h"?~~

The functions need to be declared in MergeAudioFiles.h, just like in normal C++.

edited Nov 22, 2010 at 14:02

answered Nov 22, 2010 at 13:42

Tom Dalling

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