Exercise 7 Chapter 4

[alexsom]

Here is my take on Exercise 7 Chapter 4.


#import <Foundation/Foundation.h>

//......interface section...........
@interface Rectangle:NSObject
{
    int width;
    int height;
}
//.....methods for width and height.....

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

@end

//.....implementation section.....
@implementation Rectangle: NSObject

-(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 2*width+2*height;
}

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

   
    @autoreleasepool
   
    {
    Rectangle *myRectangle=[[Rectangle alloc] init];
       
    [myRectangle setWidth: 15];
    NSLog(@"Set the width to %i", [myRectangle width]);
       
    [myRectangle setHeight:20];
    NSLog(@"Set the height to %i",[myRectangle height]);   
       
    NSLog(@"Area of the rectangular is %i",[myRectangle area]);   
       
    NSLog(@"Perimeter of the rectangle is %i", [myRectangle perimeter]);   
    }
    return 0;
}

Output Window:

Set the width to 15
Set the height to 20
Area of the rectangular is 300
Perimeter of the rectangle is 70
 
All the best.