Object-c 类的定义

类定义文件：

#import <Foundation/Foundation.h>



//fraction :分数

@interface Fraction : NSObject

{//定义类得参数

    int numerator;    //分子

    int denominator;  //分母

}





-(void) print;

-(void) setNumerator:   (int)n;

-(void) setDenominator: (int)d;



-(int) getNumerator;

-(int) getDenominator;



@end

类实现文件：

#import "Fraction.h"



@implementation Fraction



- (id)init

{

    self = [super init];

    if (self) {

        // Initialization code here.

    }

    

    return self;

}



-(void) print{

    NSLog(@"%i/%i",numerator,denominator);

}





-(void) setNumerator:(int)n

{

    numerator = n;

}



-(void) setDenominator:(int)d

{

    denominator = d;

}



-(int)getNumerator

{

    return numerator;

}



-(int)getDenominator

{

    return denominator;

}

主实现文件：

int main (int argc, const char * argv[])

{



    // insert code here...

    //初始化类  

    Fraction *fraction = [[Fraction alloc]init];

    

    //调用类的方法

    [fraction setNumerator:1];

    [fraction setDenominator:3];

    [fraction print];

    

    int d = fraction.getDenominator;            

    return 0;

}