OC分數的實現

#import

@inte***ce fraction : nsobject

nsinteger _numerator;//分數的分子

nsinteger _denominator;//分數的分母

//構造方法的設計

- (id)initwithnumerator:(nsinteger)numerator anddenominator:(nsinteger)denominator;

//setter方法

- (void)setnumerator:(nsinteger)numerator;

- (void)setdenominator:(nsinteger)denominator;

- (void)setnumorator:(nsinteger)numerator anddenominator:(nsinteger)denominator;

//getter方法

- (nsinteger)numerator;

- (nsinteger)denominator;

//分數的加減乘除運算

- (void)addfraction:(fraction *)afraction;

- (void)subfraction:(fraction *)afraction;

- (void)mulfraction:(fraction *)afraction;

- (void)divfraction:(fraction *)afraction;

//實現約分

- (void)reduce;

//列印分數

- (void)printfraction;

@end

@implementationfraction

//init方法實現

- (id)initwithnumerator:(nsinteger)numerator anddenominator:(nsinteger)denominator

if (self = [super init]) {

_numerator = numerator;

_denominator = denominator;

returnself;

//srtter方法實現

- (void)setnumerator:(nsinteger)numerator

_numerator = numerator;

- (void)setdenominator:(nsinteger)denominator

_denominator = denominator;

- (void)setnumerator:(nsinteger)numerator anddenominator:(nsinteger)denominator

_numerator = numerator;

_denominator = denominator;

//getter方法

- (nsinteger)numerator

return _numerator;

- (nsinteger)denominator

return _denominator;

//分數的加法運算

- (void)addfraction:(fraction *)afraction

_numerator = [self numerator] * [afraction denominator] + [afraction numerator] * [self denominator];

_denominator = [self denominator] * [afraction denominator];

//分數的減法運算

- (void)sbufraction:(fraction *)afraction

_numerator = [self numerator] * [afraction denominator] - [afraction numerator] * [self denominator];

_denominator = [self denominator] * [afraction denominator];

//分數的懲罰運算

- (void)mulfraction:(fraction *)afraction

_numerator = [self numerator] * [afraction numerator];

_denominator = [self denominator] * [afraction denominator];

//分數的除法運算

- (void)divfraction:(fraction *)afraction

_numerator = [self numerator] * [afraction denominator];

_denominator = [self denominator] * [afraction numerator];

//分數的約分

- (void)reduce

nsinteger n = _numerator;

nsinteger d = _denominator;

while (d) {

nsinteger temp = n%d;

n = d;

d = temp;

_numerator /= n;

_denominator /= n;

- (void)printfraction

nslog(@"fraction = %li/%li", _numerator, _denominator);

@end

int main(int argc, const

char * argv) {

@autoreleasepool{

fraction *f1 = [[fraction alloc] initwithnumerator:1 anddenominator:3];

fraction *f2 = [[fraction alloc] initwithnumerator:2 anddenominator:5];

//        [f1 addfraction:f2];

//        [f1 printfraction];

[f1 mulfraction:f2];

[f1 printfraction];

fraction *f3 = [[fraction alloc] initwithnumerator:1 anddenominator:3];

fraction *f4 = [[fraction alloc] initwithnumerator:4 anddenominator:15];

[f3 addfraction:f4];

[f3 reduce];

[f3 printfraction];

return0;

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