Re: unused variable warnings
Re: unused variable warnings
- Subject: Re: unused variable warnings
- From: "Clark S. Cox III" <email@hidden>
- Date: Wed, 12 Feb 2003 10:21:29 -0500
On Wednesday, Feb 12, 2003, at 10:05 US/Eastern, Phrygian wrote:
Hello Cocoa Programmers,
I'm at a loss as to why I keep getting an "unused variable"
compiler error
in project builder under the following conditions,
NSString * somestring = @"this is a string";
or
NSCalendarDate * today = [NSCalendarDate calendarDate];
Are you actually using somestring or today later in the code?
the compiler will give a warning that somestring and today are unused
variables.
However, if I do the following,
NSString * somestring;
somestring = @"this is a string";
or
NSCalendarDate * today;
today = [NSCalendarDate calendarDate];
That is because those variables are now used. Remember that assignment
and initialization are two completely different things.
int foo = 0; //foo is initialized to the value zero (this does not
count as "using" the variable)
int bar; //bar is initialized to an unknown value
bar = 0; //bar is assigned the value zero (this does counts as "using"
the variable)
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