3rd printing p265 location 5921 error

[xjames]

unless I did something wrong, when I ran prog 13.9 modified with the __block modifier, my output is
foo = 15
foo = 20

which would make sense (the book currently says
foo = 10
foo = 20
)

Also, for readability, I'd suggest changing the comment as I did below, on the line

Code: (Objective-C)

foo = 20;

Code: (Objective-C)

#import <Foundation/Foundation.h>

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

    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];

    __block int foo = 10;
    
    void (^printFoo)(void) = ^(void) {
        NSLog(@"foo = %i",foo);
        foo = 20; // ** THIS LINE GENERATES A COMPILER ERROR WITHOUT THE __block MODIFIER
    };
    
    foo = 15;
    
    printFoo();
    NSLog(@"foo = %i",foo);

    [pool drain];
    return 0;
}

[skochan]

Hi,

THanks for your post.  This error has been previously noted in the Errata for the first printing and has been fixed in the second printing (that's the second printing of the 3rd edition).

Cheers,

Steve