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标题: 继承和组合，对象调用 [打印本页]
作者: xileo0    时间: 2015-3-8 12:08
标题: 继承和组合，对象调用

  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

  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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作者: xileo0    时间: 2015-3-8 12:09
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



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