Exercise 2

[John Shirley]

Hi all..  Just done exercise 2 which should have been an easy one but seemed to have taken a while  

This is my first attempt

Code: (Objective-C)

#import <Foundation/Foundation.h>

int main (int argc, const char * argv[]) {
    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];

	float	 a = 27;
	float	 b = 32;
	float	 celsius;
	
	celsius = (a - b)/1.8;   // convertion
	NSLog (@"The temperature degrees F is: %f ", celsius);
		
    [pool drain];
    return 0;
}

Ok this is keeping it simple and when I looked here on the forum I got the feeling I was missing the point of  the exercise some what.  So I started it again.. Have to say I struggled a little with it and I am not sure if I am not getting the Classes, Methods thing and getting it all messed up.  After struggling on a little I came back to the forum to look at what others had done and to see where I was going wrong.  where I was struggling a little was the Interface section and Implementation section.  Think I might need to go back and read up on thoes 2 again..

If anyone can offer some advice/help on my program I would be very greatful

Thanks in advance

John

This is my code now

Code: (Objective-C)

#import <Foundation/Foundation.h>

// Interface Section
@interface Tempconverter: NSObject
{
	float Celsius;
	float Fahrenheit;
}
-(float) Celsius;
-(float) Fahrenheit;
-(void) setFahrenheit: (float) f;
-(void) calculateCelsius;
@end

//  implementation section
@implementation Tempconverter
-(float) Fahrenheit
{
	return Fahrenheit;
}

-(void) setFahrenheit: (float) f
{
	Fahrenheit = f;
}
-(void) calculateCelsius
{
	Celsius = (Fahrenheit - 32)/1.8;
}
-(float) Celsius
{
	return Celsius;
}
@end
//  Program Section
int main (int argc, const char * argv[]) {
    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
	Tempconverter *mytempconvert =[[Tempconverter alloc] init];
	[mytempconvert setFahrenheit: 27];
	[mytempconvert calculateCelsius];
	NSLog(@"Temp convertion =:%f", [mytempconvert Celsius]);
	[mytempconvert release];
    [pool drain];
    return 0;
}

[skochan]

Yes, your first approach was fine.  The second approach, using classes, is certainly more ambitious.  I looked at your code.  It's fine.  I have no suggestions.

Cheers,

Steve Kochan

[John Shirley]

Thanks for taking the time to look over it