OC 创建一个Fraction类（分数）实现分数的加减乘除，比较大小、约分等方法。 要求：为类添加属性

#import <Foundation/Foundation.h>/*创建一个Fraction类（分数）实现分数的加减乘除，比较大小、约分等方法。  要求：为类添加属性 */@interface Fraction : NSObject{    NSInteger _denominator;  //分母    NSInteger _member;       //分子}@property (nonatomic) NSInteger denominator;  //分母@property (nonatomic) NSInteger member;       //分子//初始化方法- (id)initWithDenominator:(NSInteger)denominator member:(NSInteger)member;//分数相加- (Fraction *)add:(Fraction *)num1;//分数相减- (Fraction *)subtract:(Fraction *)num1;//分数相乘- (Fraction *)multiply:(Fraction *)num1;//分数相除- (Fraction *)division:(Fraction *)num1;//分数比较大小- (NSComparisonResult)compare:(Fraction *)num1;//分数约分- (void)reductionOfFraction;//求最大公约数- (NSInteger)getMaxDivisorWithNumber:(NSInteger)number1 number2:(NSInteger)number2;@end

<pre name="code" class="objc">#import "Fraction.h"@implementation Fraction@synthesize denominator = _denominator;@synthesize member = _member;//初始化方法- (id)initWithDenominator:(NSInteger)denominator member:(NSInteger)member{    self = [super init];    if (self) {        self.denominator = denominator;        self.member = member;    }    return self;}//求最大公约数- (NSInteger)getMaxDivisorWithNumber:(NSInteger)number1 number2:(NSInteger)number2{    NSInteger  temp = 0;    if (number1 < 0) {        number1 = -number1;    }    while (number2 != 0) {        temp = number1 % number2;        number1 = number2;        number2 = temp;    }    return number1;}//分数约分- (void)reductionOfFraction{    NSInteger maxDivisor = [self getMaxDivisorWithNumber:self.member number2:self.denominator];    self.member /= maxDivisor;    self.denominator /= maxDivisor;}//分数相加- (Fraction *)add:(Fraction *)num1{    Fraction *num = [[Fraction alloc] init];    num.member = self.member * num1.denominator + num1.member * self.denominator;    num.denominator = self.denominator * num1.denominator;    [num reductionOfFraction];    return num;}//分数相减- (Fraction *)subtract:(Fraction *)num1{    Fraction *num = [[Fraction alloc] init];    num.member = self.member * num1.denominator - num1.member * self.denominator;    num.denominator = self.denominator * num1.denominator;    [num reductionOfFraction];    return num;}//分数相乘- (Fraction *)multiply:(Fraction *)num1{    Fraction *num = [[Fraction alloc] init];    num.member = self.member * num1.member;    num.denominator = self.denominator * num1.denominator;    [num reductionOfFraction];    return num;}//分数相除- (Fraction *)division:(Fraction *)num1{    Fraction *num = [[Fraction alloc] init];    num.member = self.member * num1.denominator;    num.denominator = self.denominator * num1.member;    [num reductionOfFraction];    return num;}//分数比较大小- (NSComparisonResult)compare:(Fraction *)num1{    NSInteger a = self.member * num1.denominator;    NSInteger b = num1.member * self.denominator;    if (a > b) {        return NSOrderedDescending;    }else if(a < b){        return NSOrderedAscending;    }else{        return NSOrderedSame;    }}//重写description- (NSString *)description{    NSString *str = nil;    if (self.member % self.denominator == 0) {        str = [NSString stringWithFormat:@"%ld", self.member / self.denominator];    }else{    str = [NSString stringWithFormat:@"%ld/%ld", self.member, self.denominator];    }    return str;}@end

@autoreleasepool {        Fraction *number1 = [[Fraction alloc] initWithDenominator:6 member:0];        Fraction *number2 = [[Fraction alloc] initWithDenominator:6 member:6];        //加法        Fraction *addNum = [number1 add:number2];        NSLog(@"%@", addNum);        //约分        [number1 reductionOfFraction];        NSLog(@"%@", number1);        //减法        Fraction *subNum = [number1 subtract:number2];        NSLog(@"%@", subNum);        //乘法        Fraction *mulNum = [number1 multiply:number2];        NSLog(@"%@", mulNum);        //除法        Fraction *divNum = [number1 division:number2];        NSLog(@"%@", divNum);        //比较大小        NSInteger a =  [number1 compare:number2];        NSLog(@"%ld",a);           }