1. #import <Foundation/Foundation.h>
   
2. //身材
   
3. @interface Stature : NSObject
   
4. {
   
5.     double _height;//身高 /m
   
6.     double _weight;//体重 /kg
   
7. }
   
8. - (void)setHeight:(double)height;
   
9. - (double)height;
   
10. - (void)setWeight:(double)weight;
    
11. - (double)weight;
    
12. @end
    
13. @implementation Stature
    
14. // 身高的getter和setter
    
15. - (void)setHeight:(double)height
    
16. {
    
17.     _height = height;
    
18. }
    
19. - (double)height
    
20. {
    
21.     return _height;
    
22. }
    
23. // 体重的getter和setter
    
24. - (void)setWeight:(double)weight
    
25. {
    
26.     _weight = weight;
    
27. }
    
28. - (double)weight
    
29. {
    
30.     return _weight;
    
31. }
    
32. @end
    
33. 
    
34. @interface Person : NSObject
    
35. {
    
36.     Stature *_stature;//身材
    
37.     int _age;//年龄
    
38. }
    
39. - (void)setAge:(int)age;
    
40. - (int)age;
    
41. //---身材的setter和getter
    
42. - (void)setStature:(Stature *)stature;
    
43. - (Stature *)stature;
    
44. @end
    
45. @implementation Person
    
46. - (void)setAge:(int)age
    
47. {
    
48.     _age = age;
    
49. }
    
50. - (int)age
    
51. {
    
52.     return _age;
    
53. }
    
54. - (void)setStature:(Stature *)stature
    
55. {
    
56.     _stature = stature;
    
57. }
    
58. - (Stature *)stature
    
59. {
    
60.     return _stature;
    
61. }
    
62. @end
    
63. int main()
    
64. {
    
65.     Person *p = [Person new];
    
66.     [p setAge:24];//p.age
    
67.     Stature *s = [Stature new];
    
68.     [s setHeight:1.8];
    
69.     [s setWeight:60];
    
70.    
    
71.     [p setStature:s];
    
72.     return 0;
    
73. }

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额。。问题不见了。要输出p对象的身材成员值，要怎样写输出语句，怎样调用组合的成员变量值