A cleaner way to do this?

[JasonWitz]

I would like to know a cleaner way to get the output shown below.

Code: (Objective-C)

	// addition
	resultFraction = [frac1 add: frac2];
	NSLog(@"%i/%i + %i/%i = %i/%i", [frac1 numerator], [frac1 denominator],
												[frac2 numerator], [frac2 denominator],
													[resultFraction numerator], [resultFraction denominator]);

2010-03-26 02:33:51.245 7x1[5628:10b] Enter a fraction: (number space number)
1 2
2010-03-26 02:33:53.502 7x1[5628:10b] Enter a fraction: (number space number)
3 4
2010-03-26 02:33:54.251 7x1[5628:10b] 1/2 + 3/4 = 5/4
2010-03-26 02:33:54.251 7x1[5628:10b] 1/2 - 3/4 = -1/4
2010-03-26 02:33:54.252 7x1[5628:10b] 1/2 * 3/4 = 3/8
2010-03-26 02:33:54.253 7x1[5628:10b] 1/2 / 3/4 = 2/3

The Debugger has exited with status 0.

[skochan]

When you get to Chapter 15, there's a brief mention of adding a description method to your class that will get called by NSLog whenever it see the "print object" format characters %@.  Add this to your interface section:

Code: (Objective-C)

-(NSString *) description
{
     return [NSString stringWithFormat: @"%i/%i", numerator, denominator];
}

and then you can write a statement like this in main:

Code: (Objective-C)

NSLog(@"%@ + %@ = %@", frac1, frac2, resultFraction);

Cheers,

Steve Kochan

[JasonWitz]

Thanks Steve!

Jason