#import
/*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
#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
{
NSIntegertemp = 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);
}
【OC编程|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）】
