Exercise 7, Chapter 4

[MarkReid]

Sorry it's a little late but took a little longer than expected to get the free time to complete the assignments this last week.

Was tempted to add a initWithWidth: andHeight: method but kept it simple so it would be easier for others to compare notes. 

main.m

Code: (Objective-C)

#import <Foundation/Foundation.h>
#import "Rectangle.h"

int main (int argc, const char * argv[]) {
    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
	
	Rectangle *myRect = [[Rectangle alloc] init];
	
	[myRect setWidth: 4];
	[myRect setHeight: 2];
	
	NSLog(@"Your rectangle is %i wide and %i high.", [myRect width], [myRect height]);
	
	NSLog(@"The area of your rectangle is %i \n and the perimeter of your rectangle is %i.", [myRect area], [myRect perimeter]);
	
	[myRect release];
	
    [pool drain];
    return 0;
}

Rectangle.h

Code: (Objective-C)

//  Rectangle.h

#import <Cocoa/Cocoa.h>


@interface Rectangle : NSObject {
	int width;
	int height;
}

-(void) setWidth: (int) w;
-(void) setHeight: (int) h;
-(int) width;
-(int) height;
-(int) area;
-(int) perimeter;

@end

Rectangle.m

Code: (Objective-C)

//  Rectangle.m

#import "Rectangle.h"


@implementation Rectangle

-(void) setWidth: (int) w
{
	width = w;
}

-(void) setHeight: (int) h
{
	height = h;
}

-(int) width
{
	return width;
}

-(int) height
{
	return height;
}

-(int) area
{
	return width * height;
}

-(int) perimeter
{
	return width * 2 + height * 2;
}

@end