1 #import <Foundation/Foundation.h> 2 //xieyi 3 @protocol showOn 4 @required 5 -(void)printOn; 6 @end 7 // lei 8 @interface MyPoint : NSObject<showOn,NSCopying>{ 9 int x; 10 int y; 11 } 12 @property (nonatomic,assign)int x,y; 13 -(id)initWithX:(int)_x andY:(int)_y; 14 @end 15 // leibie fenlei 16 @interface MyPoint(MoveSet) 17 18 -(void)moveToX:(int)_x andY:(int)_y; 19 20 21 @end 22 23 #import "MyPoint.h" 24 25 @implementation MyPoint 26 @synthesize x,y; 27 -(id)initWithX:(int)_x andY:(int)_y{ 28 if(_x==0) 29 x=1; 30 if(_y==0) 31 y=1; 32 x=_x; 33 y=_y; 34 return self; 35 } 36 -(id)copyWithZone:(NSZone *)zone{ 37 MyPoint* newPoint=[[MyPoint allocWithZone:zone] initWithX:x andY:y]; 38 return newPoint; 39 } 40 -(void)printOn{ 41 NSLog(@" x = %d , y = %d ",x,y); 42 } 43 @end 44 @implementation MyPoint(MoveSet) 45 -(void)moveToX:(int)_x andY:(int)_y{ 46 x=_x; 47 y=_y; 48 } 49 @end 50 51 #import <Foundation/Foundation.h> 52 #import "MyPoint.h" 53 54 @interface Circle : NSObject<showOn>{ 55 MyPoint* point; 56 int radius; 57 } 58 @property (nonatomic,copy)MyPoint* point; 59 @property (nonatomic,assign)int radius; 60 -(id)initWithPoint:(MyPoint* )_p andRadius:(int)_r; 61 -(id)initWithPoint:(MyPoint *)_p; 62 63 @end 64 65 66 #import "Circle.h" 67 68 @implementation Circle 69 @synthesize point; 70 @synthesize radius; 71 72 -(id)initWithPoint:(MyPoint *)_p andRadius:(int)_r{ 73 if(_r==0) 74 { 75 radius=1; 76 } 77 if(_p==nil) 78 return nil; 79 if(self=[super init]) 80 { 81 if(point!=_p) 82 { 83 if(point) 84 [point release]; 85 point =[[MyPoint alloc]initWithX:_p.x andY:_p.y]; 86 } 87 88 } 89 radius=_r; 90 return self; 91 } 92 93 94 -(id)initWithPoint:(MyPoint*)_p{ 95 self=[self initWithPoint:_p andRadius:10]; 96 return self; 97 } 98 99 -(void)printOn{100 NSLog(@"point(x,y) = (%d,%d),radius = %d",point.x,point.y,radius); 101 }102 103 -(void) dealloc{104 [point release];105 [super dealloc];106 }107 108 @end
