[Ilugc] [Technical] Does 'C' language specification has 'boolean' datatype ?
- From: thescriptdevil@xxxxxxxxx (Ashok Gautham)
- Date: Sat, 17 Dec 2011 13:55:44 +0530
On Sat, Dec 17, 2011 at 01:12:10PM +0530, Raja Subramanian wrote:
Since C defines any non-zero value as true, rather than defining true as 1
you better define true as !0. Ie, true is the opposite of false.
This is the only way to ensure that a test against 2 true values will work
in all cases.
True. Interestingly, I have seen some code bases (Minix?) that use ! !
condition to make sure the value becomes 0 or 1.
For example,
int a = 113;
printf("%d\n", !!a);
will display 1
---
Ashok Gautham
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