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Kochan书在学习目标C时如何克服Xcode 4的错误
原标题:How to overcome Xcode 4 errors when learning Objective C by Kochan book

So, I m learning Objective C by this book. It is thought to be great and all. http://www.amazon.com/Programming-Objective-C-2-0-Stephen-Kochan/dp/0321566157/ref=sr_1_1?ie=UTF8&qid=1303332025&sr=8-1

But after installing new Xcode (version 4) when i tried to finish the exercise form the book (3.2) it gives me like 10 compilation errors that I can t identify. What can I do about this? Getting xcode 3 is not really an option. For example there are many semantic errors that keep saying undeclared identifiers pointing to empty spaces...

also it isn t accepting this line of code:

Fraction *myFraction;

I got class myFraction, what s wrong with this one?

Also there is method declaration in this class

- (void) setNum : (int) n;

it says, expecting member name or ; after declaration specifiers. What can this mean? There already is a semicolon there.

最佳回答

www.un.org/Depts/DGACM/index_spanish.htm

I got class myFraction, what s wrong with this one?

在这项发言中,Fraction为贵类别的名称......myFraction为贵物体的名称。 如果您的级别被真正称为我的框架,这一发言将是:

myFraction *myFraction;

Also there is method declaration in this class

- (void) setNum : (int) n;

it says, expecting member name or ; after declaration specifiers. What can this mean? There already is a semicolon there.

I don t see anything wrong with this... can you post the code that surrounds this method declaration?

问题回答

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