Reviewing Concepts: Our Kind of Portal?

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run
[Switching to process 28127]
Running…
The SLO Portal is a TimePortal

Debugger stopped.
Program exited with status value:0.





#import <stdio.h>
#import <Foundation/NSObject.h>

// 
// Based on ideas from Page 116 of Virtual Quickstart Guide Objective-C (Holzner)
// Verify that an object belongs to a class
// TIME TRAVEL IMPLEMENTATION
//    Verify that an object is a Time Travel Portal
//     Note: Travellers are into Slow Travel these days and Period Pilots likes to stay abreast of trends
//            so portals in SLO are particularly interesting
// It looks like 'isKindOfClass is a METHOD inherited from the NSObject superclass/baseclass

// isKindOfClass tells me wether an object is
//     a) a member of a class (like isMemberOfClass does)
// AND b) is a a member of any class derivedfrom that class
//

@interface TimePortal:NSObject
-(void) print;
@end

//METHODS  for TimePortal

@implementation TimePortal
-(void) print
{
    printf("This is TimePortal.\n");
}

@end

@interface SLOPortal:TimePortal
-(void) print;
@end

//METHODS  for SLOPortal

@implementation SLOPortal
-(void) print
{
    printf("This is SLOPortal.\n");
}

@end

int main (void) {
    TimePortal *c1 = [TimePortal new];
   
    // Find syntax for this method
    //
   
    if ([c1 isKindOfClass: [TimePortal class]]  ==YES)
    {
        printf("The SLO Portal is a TimePortal\n");
    }
   
     return 0;
}