#import <stdio.h>
#import <objc/objc.h>
#import <objc/Object.h>

@interface Fraction: Object
{
    int numerator;
    int denominator;
}
-(Fraction*) initWithNumerator: (int) n denominator: (int) d;
-(void) print;
-(void) setNumerator: (int) n;
-(void) setNumerator: (int) n andDenominator: (int) d;
-(void) setDenominator: (int) d;
-(int) numerator;
-(int) denominator;
@end

///////////////////////////////////////////////////////////

@implementation Fraction

-(Fraction*) initWithNumerator: (int) n denominator: (int) d 
{
    self = [super init];

    if ( self ) 
	{
        [self setNumerator: n andDenominator: d];
    }

    return self;
}

-(void) print 
{
    printf( "%i/%i", numerator, denominator );
}
 
-(void) setNumerator: (int) n 
{
    numerator = n;
}

-(void) setNumerator: (int) n andDenominator: (int) d 
{
    numerator = n;
    denominator = d;
}
 
-(void) setDenominator: (int) d 
{
    denominator = d;
}
 
-(int) denominator 
{
    return denominator;
}
 
-(int) numerator 
{
    return numerator;
}
@end

///////////////////////////////////////////////////////////

@interface Complex: Object 
{
    double real;
    double imaginary;
}

-(Complex*) initWithReal: (double) r andImaginary: (double) i;
-(void) setReal: (double) r;
-(void) setImaginary: (double) i;
-(void) setReal: (double) r andImaginary: (double) i;
-(double) real;
-(double) imaginary;
-(void) print;
@end

///////////////////////////////////////////////////////////

@implementation Complex
-(Complex*) initWithReal: (double) r andImaginary: (double) i 
{
    self = [super init];

    if ( self ) 
	{
        [self setReal: r andImaginary: i];
    }

    return self;
}

-(void) setReal: (double) r 
{
    real = r;
}

-(void) setImaginary: (double) i 
{
    imaginary = i;
}

-(void) setReal: (double) r andImaginary: (double) i 
{
    real = r;
    imaginary = i;
}

-(double) real 
{
    return real;
}

-(double) imaginary 
{
    return imaginary;
}

-(void) print 
{
    printf( "%f + %fi", real, imaginary );
}


///////////////////////////////////////////////////////////


int main(int argc, const char *argv[]) 
{
    // create a new instance
    Fraction *frac = [[Fraction alloc] initWithNumerator: 1 denominator: 10];
    Complex *comp = [[Complex alloc] initWithReal: 10 andImaginary: 15];
    id number;
	
	
 	 // print fraction
    number = frac;
    printf( "The fraction is: " );
    [number print];
    printf( "\n" );

    // print complex
    number = comp;
    printf( "The complex number is: " );
    [number print];
    printf( "\n" );

    // free memory
    [frac release];
    [comp release];

    return 0;
}
@end