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‎Chap10_exercise/Chap10_exercise.xcodeproj/project.pbxproj‎

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// !$*UTF8*$!
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name = Chap10_exercise;
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CLANG_WARN_CONSTANT_CONVERSION = YES;
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CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
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CLANG_WARN_EMPTY_BODY = YES;
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CODE_SIGN_IDENTITY = "-";
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COPY_PHASE_STRIP = NO;
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DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
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ENABLE_NS_ASSERTIONS = NO;
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GCC_NO_COMMON_BLOCKS = YES;
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GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
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‎Chap10_exercise/Chap10_exercise.xcodeproj/project.xcworkspace/contents.xcworkspacedata‎

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‎Chap10_exercise/Chap10_exercise.xcodeproj/project.xcworkspace/xcuserdata/Yingboliu.xcuserdatad/UserInterfaceState.xcuserstate‎

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‎Chap10_exercise/Chap10_exercise.xcodeproj/xcuserdata/Yingboliu.xcuserdatad/xcschemes/xcschememanagement.plist‎

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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
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<plist version="1.0">
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<dict>
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<key>SchemeUserState</key>
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<dict>
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<key>Chap10_exercise.xcscheme</key>
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<dict>
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<key>orderHint</key>
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<integer>0</integer>
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<key>SuppressBuildableAutocreation</key>
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<key>B4EDACED1C147BA1000AC60D</key>
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<key>primary</key>
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<true/>
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</plist>

‎liuyingbo/Chap10_exercise/main.m‎

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//
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// main.m
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// Chap10_exercise
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//
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// Created by Yingbo Liu on 12/6/15.
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// Copyright © 2015 Yingbo Liu. All rights reserved.
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//
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#pragma mark - exercise 1#
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#import <Foundation/Foundation.h>
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@class XYPoint;
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@interface Rectangle: NSObject
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@property int width, height;
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-(XYPoint *) origin;
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-(void) setOrigin: (XYPoint *) pt;
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-(id) setWidth: (int) w andHeight: (int) h;
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-(int) area;
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-(int) perimeter;
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@end
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@implementation Rectangle
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-(instanceType) setWidth: (int) w andHeight: (int) h{
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self = [super int];
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if (self)
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[self setWidth:w andHeight:h ];
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return self;
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}
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@end
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#pragma mark - exercise 2#
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@interface Rectangle, NSObject
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-(id) initWithSide:(int) side;
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@end
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@implementation Rectangle
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-(id) initWithSide:(int) side{
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self = [super initWithSide];
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if (self){
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[self initWithSide];
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}
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return self;
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}
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@end
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#pragma mark - exercise 3#
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//How can you retrieve the value of the counter
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//We could have a local static variable that would be set to only
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//once when the program started. It would retain its value through
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//successive invocations of the method.Everytime the method is
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//called, the counter will increment by one
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#pragma mark - exercise 4#
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enum Day { Sunday, Monday, Tuesday, Wednesday, Thrusday, Friday, Saturday}
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typedef Int Day;
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Day number;
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#pragma mark - exercise 5#
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enum FractionObj {f1 = [[Fraction alloc] init],f2 = [[Fraction alloc] init]};
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typedef NSString FractionObj;
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FractionObj newFractions；
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#pragma mark - exercise 6#
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float f = 1.00;
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short int i = 100;
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long int l = 500L;
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double d = 15.00;
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f + i ＝ 101.00000 float
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l / d = 33.3333 float
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l + f = 501.00000 float
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l * i = 50000 long
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f / 2 =0.5000000 float
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i / (d + f) = 6.25000 float
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l / (i * 2.0) ＝0.50000 float
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l + i / (double) l = 4136 double
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‎liuyingbo/Chap4_exercise/Chap4_exercise.xcodeproj/project.xcworkspace/xcuserdata/Yingboliu.xcuserdatad/UserInterfaceState.xcuserstate‎

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‎liuyingbo/Chap5_exercise/Chap5_exercise.xcodeproj/project.xcworkspace/xcuserdata/Yingboliu.xcuserdatad/UserInterfaceState.xcuserstate‎

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‎liuyingbo/Chap7_exercise/Chap7_exercise.xcodeproj/project.xcworkspace/xcuserdata/Yingboliu.xcuserdatad/UserInterfaceState.xcuserstate‎

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‎liuyingbo/Chap8_exercise/Chap8_exercise.xcodeproj/project.xcworkspace/xcuserdata/Yingboliu.xcuserdatad/UserInterfaceState.xcuserstate‎

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‎liuyingbo/chap9_exercise/chap9_exercise.xcodeproj/project.xcworkspace/xcuserdata/Yingboliu.xcuserdatad/UserInterfaceState.xcuserstate‎

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