add working C code to Xcode cocoa project

Redesign your main() as a function that your program can call directly ( ( argc, argv ) might not be the ideal way for your project to use the function ) and rename it. If you have written your program the best way possible, the whole main() function could be omitted from the source for your project (the working part of the program would be in other .h/.c files that could be imported as-is).

 

Is your C program a command line program? GUI code is event driven, if you have divided your functionality into separate functions then you will have an easier job moving these inside classes and method implementations. Having a main in itself should not create a compile error as even Cocoa programs has a main (legal C is legal Obj-c) it just does not make sense to center you program around main.

 

Put this line in the file that contains your command-line main() function.

Code:

#define main cmd_main

Now there won't be two main() functions, which is illegal in both C and Objective-C. And you can call the command-line main as cmd_main(), if you wish.

 

Why not just rename main() in the old C code then? I did not suggest he should have two mian() functions btw, just to make that clear. There will most likely be more modifications required to get it working though, specifically to tie in different functionality from the C code to views and UI controllers and so on.