Why this~~~~?

[UnicornLeo]

I just read your book(3rd edition) for several minutes.
I've tried to type like this

Code: (Objective-C)

#import <Foundation/Foundation.h>

int main (int argc, const char * argv[])   { 
    NSAutoreleasePool * pool = [[ NSAutoreleasePool alloc ] init ];
    NSLog (@"Programming is fun!");
    [Pool drain];
    return 0;
}

in Xcode, but there is no color in such as NSAutoreleasePool and NSLog

they are just black. And they cannot run.

why?

[happyzhb]

First of all, the title of this section clearly says this is for the FOURTH edition. You are posting questions about 3rd Edition, so I am moving this to the right place.

Second, you need to get the latest 4th edition if you plan to hope everything work in the latest Xcode 4.2.

Third, use the code below, you should be able to run:

Code: (Objective-C)

//Program 2.1
// First program example
#import <Foundation/Foundation.h>
int main (int argc, const char * argv[]) {
@autoreleasepool {
NSLog (@"Programming is fun!");
}
return 0; 
}

Post back if you have further questions, happy programming!