1. 6.设计一个类Circle，用来表示二维平面中的圆
   
2. 1> 属性
   
3. * double radius （半径）
   
4. * Point2D *point （圆心）
   
5. 
   
6. 2> 方法
   
7. * 属性相应的set和get方法
   
8. * 设计一个对象方法判断跟其他圆是否相交（重叠返回YES，否则返回NO）
   
9. * 设计一个类方法判断两个圆是否相交（重叠返回YES，否则返回NO）
   
10. 
    
11. #import <Foundation/Foundation.h>
    
12. #import <math.h>
    
13. 
    
14. @interface Point2D : NSObject
    
15. {
    
16.     double _x;
    
17.     double _y;
    
18.    
    
19. }
    
20. - (void)setX:(double)x;
    
21. - (double)x;
    
22. 
    
23. - (void)setY:(double)y;
    
24. - (double)y;
    
25. 
    
26. - (void)setX:(double)x andY:(double)y;
    
27. 
    
28. - (double)distanceWithOther :(Point2D *)other;
    
29. 
    
30. + (double)distanceWithPonit1:(Point2D *)point1 andPoint2:(Point2D *)point2;
    
31. @end
    
32. 
    
33. @implementation Point2D
    
34. - (void)setX:(double)x
    
35. {
    
36.     _x = x;
    
37. }
    
38. - (double)x
    
39. {
    
40.     return _x;
    
41. }
    
42. 
    
43. - (void)setY:(double)y
    
44. {
    
45.     _y = y;
    
46. }
    
47. - (double)y
    
48. {
    
49.     return _y;
    
50. }
    
51. 
    
52. - (void)setX:(double)x andY:(double)y
    
53. {
    
54.     _x = x;
    
55.     _y = y;
    
56. }
    
57. 
    
58. - (double)distanceWithOther :(Point2D *)other
    
59. {
    
60.     return  [Point2D distanceWithPonit1:self andPoint2:other];
    
61. }
    
62. 
    
63. 
    
64. + (double)distanceWithPonit1:(Point2D *)point1 andPoint2:(Point2D *)point2
    
65. {
    
66.     double xDelta = [point1 x] - [point2 x];
    
67.     double xDeltaPingFang = pow(xDelta, 2);
    
68.    
    
69.     double yDelta = [point1 y] - [point2 y];
    
70.     double yDeltaPingFang = pow(yDelta, 2);
    
71.    
    
72.     return sqrt(xDeltaPingFang + yDeltaPingFang);
    
73. 
    
74. }
    
75. @end
    
76. 
    
77. @interface Circle : NSObject
    
78. {
    
79.     double _radius;
    
80.     Point2D *_point;
    
81. }
    
82. - (void)setRadius:(double)radius;
    
83. - (double)radius;
    
84. 
    
85. - (void)setPoint:(Point2D *)point;
    
86. - (Point2D *)point;
    
87. 
    
88. - (BOOL)isInteraceWithOther:(Circle *)other;
    
89. + (BOOL)isInteraceBetweenCircle1:(Circle *)circle1 andCircle2:(Circle *)circle2;
    
90. @end
    
91. 
    
92. @implementation Circle
    
93. - (void)setRadius:(double)radius
    
94. {
    
95.     _radius = radius;
    
96. }
    
97. - (double)radius
    
98. {
    
99.     return _radius;
    
100. }
     
101. 
     
102. - (void)setPoint:(Point2D *)point
     
103. {
     
104.     _point = point;
     
105. }
     
106. - (Point2D *)point
     
107. {
     
108.     return _point;
     
109. }
     
110. - (BOOL)isInteraceWithOther:(Circle *)other
     
111. {
     
112.     return [Circle isInteraceBetweenCircle1:self andCircle2:other];
     
113. }
     
114. + (BOOL)isInteraceBetweenCircle1:(Circle *)circle1 andCircle2:(Circle *)circle2
     
115. {
     
116.     Point2D *point1 = [circle1 point];
     
117.     Point2D *point2 = [circle2 point];
     
118.    
     
119.     double distance = [point1 distanceWithOther:point2];
     
120.     double radiusSum = [circle1 radius] + [circle2 radius];
     
121.    
     
122.     return distance < radiusSum;
     
123. }
     
124. @end
     
125. int main ()
     
126. {
     
127.     Circle *c1 = [Circle new];
     
128.     [c1 setRadius:2];
     
129.    
     
130.     Point2D *p1 = [Point2D new];
     
131.     [p1 setX:10 andY:10];
     
132.     [c1 setPoint :p1];
     
133.    
     
134.     Circle *c2 = [Circle new];
     
135.     [c2 setRadius:2];
     
136.    
     
137.     Point2D *p2 = [Point2D new];
     
138.     [p2 setX:13 andY:14];
     
139.     [c2 Point2D :p2];
     
140.    
     
141.     BOOL b1 = [c1 isInteractWithOther:c2];
     
142.    
     
143.     BOOL b2 = [Circle isInteractBetweenCircle1:c1 andCircle2:c2];
     
144.    
     
145.     NSLog(@"%d %d", b1, b2);
     
146.    
     
147.     return 0 ;
     
148. 
     
149. }
     
150. 
     

复制代码

第141 和 143  你那个单词isInteract  你在定义的时候写的是isInterace  你把两个t改成e
139行  Point2D改成 setPoint
我这边看就没错误和警告了啊

陌生爱人 发表于 2014-10-10 15:38
第141 和 143  你那个单词isInteract  你在定义的时候写的是isInterace  你把两个t改成e
139行  Point2D改 ...

好的，谢谢、还是我比较粗心了。太感谢了