PRogram 3.2 - simple class, Objective-C

PRogram 3.2 - simple class

//gcc 4.8.4

#import <stdio.h>
#import <Foundation/Foundation.h>

// interface:
// - basic program-wide definitations
// - two instance variables - every instance of Fraction will have a new set of these

@interface Fraction : NSObject
{
    int numerator;
    int denominator;
}

- (void)showResults;
- (void)setNumerator:(int)n;
- (void)setDenominator:(int)d;

@end
    
// implementation:
// - implementation of the methods defined in our interface
@implementation Fraction

- (void)showResults
{
    NSLog(@"This is a fraction with a value of %d/%d", numerator, denominator);
}

-(void)setNumerator:(int)n {
    numerator = n;
}

-(void)setDenominator:(int)d {
    denominator = d;
}

@end
    
// main:
// - area where everything is executed
int main (int argc, const char * argv[]) {
    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];

// Create an instance of Fraction
    Fraction *myFraction;

myFraction = [[Fraction alloc] init];

// nmyFraction's numerator and denominator
    [myFraction setNumerator:2];
    [myFraction setDenominator:5];

// Display the value of myFraction
    [myFraction showResults];

// Clear up memory
    [myFraction release];

[pool drain];
    return 0;
}


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