compilation error in objective-c file

I am developing a command line app which uses obj-c and c files together. In my obj-c file (say x.m), I use a struct which uses an interface and the interface uses a struct. This is easily handled in C++ with forward declarations but I need obj-c in my app.

I was wondering if someone can please shed some light on what I doing wrong.

Appreciate any help and thanks in advance.

typedef struct mystruct_s
开发者_C百科{
  ...
  ....
} mystruct;

struct abc ; 
@interface abcDelegate:NSObject {
     @public
          struct abc *abc; 
} 
@end

struct abc 
{
     mystruct b
     abcDelegate *abcdelegate; 
};

I get the following error error:

expected specifier-qualifier-list before ‘mystruct’

You've forgot ;

should be

struct abc 
{
     mystruct b;
     abcDelegate *abcdelegate; 
};

If using .m file you must use c-style structs. such as

typedef struct mystruct_
{
...
} mystruct;

or

struct abc 
{
     struct mystruct b;
     abcDelegate *abcdelegate; 
};

If you want structs just like in c++ change your file extension to .mm to support c++

Almost there. Change the code to look like this:

struct abc 
{
     mystruct b;
     abcDelegate *abcdelegate; 
};

@interface abcDelegate:NSObject {
     @public
          struct abc *abc; 
} 
@end