1. 
   
2. #import <Foundation/Foundation.h>
   
3. 
   
4. //成绩
   
5. @interface Score : NSObject
   
6. {
   
7.     int _cScore;
   
8.     int _ocScore;
   
9. }
   
10. - (void)setCScore:(int)cScore;
    
11. - (int)cScore;
    
12. 
    
13. + (void)test;
    
14. 
    
15. @end
    
16. 
    
17. @implementation Score
    
18. 
    
19. - (void)setCScore:(int)cScore
    
20. {
    
21.     _cScore = cScore;
    
22. }
    
23. - (int)cScore
    
24. {
    
25.     return _cScore;
    
26. }
    
27. + (void)test
    
28. {
    
29.     NSLog(@"调用你了test函数");
    
30. }
    
31. 
    
32. @end
    
33. 
    
34. //学生
    
35. @interface Student : NSObject
    
36. {
    
37.     //组合，使Student拥有Score的成员变量
    
38.     Score *_score;
    
39.     int _weight;
    
40. }
    
41. 
    
42. @end
    
43. 
    
44. @implementation Student

复制代码

- (void)setCScore:(int)cScore
{
    _cScore = cScore;
}

- (int)cScore
{
    return _cScore;
}
@end


int main()
{
    //Score *s = [Score new];
   
    //[s setCScore:8];
   
   // NSLog(@"这个数值是%d", [s cScore]);
   
    Student *s = [Student new];
   
    [s setCScore:8];
    NSLog(@"这个数值是%d", [s cScore]);
   
    //[Student test];
   
}
后面漏写的补上