Exercice 1 A$

[Etdashou]

Hi,

at page 34 you say that $-is not a valid character. So I thought that A$ would not be ok.
However I did this code:

Code: (Objective-C)

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

	int Int;
	int playNextSong;
	//int 6_05; PAS BON
	int _calloc;
	int Xx;
	int alphaBetaRoutine;
	int clearScreen;
	int _1312;
	int z;
	int ReInitialize;
	int _;
	int A$;
	
	z = 9;
	A$ = 7;
	
    // insert code here...
    NSLog(@"Hello, World!%i", A$);
    [pool drain];
    return 0;
}

And everything is running ok and I have the output:

[Session started at 2009-08-03 12:17:12 -0400.]
2009-08-03 12:17:12.665 ex_1[3994:10b] Hello, World!7

The Debugger has exited with status 0.

Any help is appreciated!

[skochan]

You're right.  The $ is accepted for use in identifiers in GNU C/Objective-C (gcc) implementations, but is not part of the ANSI-C standard.   So it is legal for gcc, but not necessarily portable to other systems.  This may not be an issue to you as a developer of Objective-C programs that will only run under MAC OS X or on the iPhone.

Cheers,

Steve Kochan

[Etdashou]

Perfect than you!

[Halftrip]

Hi,

I'm new to Objective-C although I've programmed extensively in other languages and on other platforms.  I, too, tried the same test as our friend here.  I wasn’t too surprised to see that A$ worked as a variable as when I used to program in BASIC back in the 70’s, a dollar sign after a letter denoted a string variable.  I am curious if this is just a coincidence.

[skochan]

Yes, I see no correlation between the acceptance of the $ and its use in BASIC for string variables (that does bring back memories!).

Cheers,

Steve

[scarubia]

Should Int be invalid?