#Access Privledges

* The default access is @protected, if you don’t add any public, or private.
* Java implements this with public/private/protected modifiers infront of methods and variables. Objective-C’s approach is much more similar to C++’s for instance variables
* Access.h
*. access data must used “->” cannot use “.”, compiler will has problem.

#import 

@interface Access: NSObject {
@public
int publicVar;
@private
int privateVar;
int privateVar2;
@protected
int protectedVar;
}
@end

* Access.m

#import "Access.h"

@implementation Access
@end

* main.m

#import "Access.h"
#import

int main( int argc, const char *argv[] ) {
Access *a = [[Access alloc] init];

// works
a->publicVar = 5;
printf( "public var: %i\n", a->publicVar );

// doesn't compile
//a->privateVar = 10;
//printf( "private var: %i\n", a->privateVar );

// doesn't compile
//a.privateVar = 10;
//printf( "private var: %i\n", a.privateVar );



 [a release];
return 0;
}

* output

public var: 5