#import <Foundation/Foundation.h>
#import "Student.h"
int main(int argc, const char * argv[]) {
    @autoreleasepool {
   
        Student *ncr=[Student new];
        Computer *com=[Computer new];
        [ncr playGame:com];
        
        
    }
    return 0;
}


#import <Foundation/Foundation.h>
#import "Computer.h"
@interface Student : NSObject


-(void)playGame:(Computer *)com;

@end


#import <Foundation/Foundation.h>

@interface Computer : NSObject
-(void)game;
@end


#import "Computer.h"

@implementation Computer

-(void)game{

    NSLog(@"ncr已经超越神的杀戮了！！");

   
}

@end

#import "Student.h"

@implementation Student

-(void)playGame:(Computer *)com{

    [com game];
}
@end

顶顶顶~~