OBJECTIVE-C: Dynamic Binding

1 //Complex.h2 //03-Dynamic binding3 //4 //Created by Ma C on 15/8/11.5 //Copyright (c) 2015 BJSXT. All rights reserved.6 //7 8 #import<Foundation/Foundation.h>9 Ten @interfaceComplex:nsobject One@property (nonatomic,assign) cgfloat real;//Real Department A@property (nonatomic,assign) cgfloat imag;//Imaginary Part --(Instancetype) Initwithreal: (cgfloat) R andimag: (cgfloat) i; --(Complex *) Add: (Complex *) C; the-(void) print; - @end -  - //COMPLEX.M + //03-Dynamic binding - // + //Created by Ma C on 15/8/11. A //Copyright (c) 2015 BJSXT. All rights reserved. at // -  - #import "Complex.h" -  - @implementationComplex --(Instancetype) Initwithreal: (cgfloat) R andimag: (cgfloat) I in { -Self =[Super init]; to     if(self) +     { -_real =R; the_imag =i; *     } $     returnSelf ;Panax Notoginseng } --(Complex *) Add: (Complex *) C the { +CGFloat r = _real+c.real; ACGFloat i = _imag+C.imag; the     return[[Complex alloc]initwithreal:r andimag:i]; + } --(void) Print $ { $NSLog (@"%.2f*%.2fi", _real,_imag); - } - @end the  - //Fraction.hWuyi //03-Dynamic binding the // - //Created by Ma C on 15/8/11. Wu //Copyright (c) 2015 BJSXT. All rights reserved. - // About  $ #import<Foundation/Foundation.h> -  - @interfaceFraction:nsobject -  A@property (nonatomic,assign) Nsinteger numerator;//molecule +@property (nonatomic,assign) Nsinteger denominator;//Denominator the-(ID) Initwithnumerator: (Nsinteger) n adddenominator: (Nsinteger) D; --(fraction*) Add: (fraction*) fraction; $-(void) print; the @end the  the //fraction.m the //03-Dynamic binding - // in //Created by Ma C on 15/8/11. the //Copyright (c) 2015 BJSXT. All rights reserved. the // About  the #import "Fraction.h" the  the @implementationFraction +-(ID) Initwithnumerator: (Nsinteger) n adddenominator: (nsinteger) d - { theSelf =[Super init];Bayi     if(self) the     { the_numerator =N; -_denominator =D; -     } the     returnSelf ; the } the-(fraction*) Add: (fraction*) Fraction the { -Nsinteger n = _numerator*fraction.denominator+fraction.numerator*_denominator; theNsinteger d = _denominator*Fraction.denominator; the      the    return[[Fraction alloc]initwithnumerator:n adddenominator:d];94 } the-(void) Print the { theNSLog (@"%ld/%ld", _numerator,_denominator);98 } About @end - 101 102 //main.m103 //03-Dynamic binding104 // the //Created by Ma C on 15/8/11.106 //Copyright (c) 2015 BJSXT. All rights reserved.107 //108 109 #import<Foundation/Foundation.h> the #import "Fraction.h"111 #import "Complex.h" the intMainintargcConst Char*argv[])113 { the @autoreleasepool the     { the         //Test Score Class117Fraction *F1 = [[Fraction alloc]initwithnumerator:1118Adddenominator:2];119 [F1 print]; -         121Fraction *F2 = [[Fraction alloc]initwithnumerator:2122Adddenominator:3];123 [F2 print];124          theFraction *F3 =[F1 ADD:F2];126 [F3 print];127          -         //test the plural class129Complex *C1 = [[Complex alloc]initwithreal:5.0Andimag:3.0]; the [C1 print];131          theComplex *C2 = [[Complex alloc]initwithreal:4.3Andimag:2.5];133 [C2 print];134         135Complex *C3 =[C1 add:c2];136 [C3 print];137         138         139         //testing Dynamic Bindings $         IDPOBJ =Nil;141POBJ =f3;142 [F3 print];143         144POBJ =C3;145 [C3 print];146         147         IDarr[3] = {C1,F1,@""};148          for(intI=0;i<3; i++)149         { Max             //Run-time check151             /*if ([arr[i] iskindofclass:[fraction Class]]==yes | | [Arr[i] Iskindofclass:[complex Class]]==yes) the             */153             if([Arr[i] Respondstoselector: @selector (print)]==YES)154             {155 [arr[i] print];156               //sel sel = @selector (print);157               //[Arr[i] performselector: @selector (print)];158             }159              the             161         }162     }163     return 0;164}

OBJECTIVE-C: Dynamic Binding