Path: utzoo!attcan!uunet!mcvax!botter!ark.cs.vu.nl!maart From: maart@cs.vu.nl (Maarten Litmaath) Newsgroups: comp.std.c Subject: the logical xor operator! Message-ID: <1310@ark.cs.vu.nl> Date: 23 Jun 88 21:48:38 GMT References:<1719@ogcvax.ogc.edu> <1309@ark.cs.vu.nl> Reply-To: maart@cs.vu.nl (Maarten Litmaath) Organization: VU Informatica, Amsterdam Lines: 19 Hello, it's me again. This time the question is: why hasn't C got a logical xor operator? logical and: && logical or: || logical xor: ^^ <- fits nicely! Of course the way to come around the deficiency is: if (!(expr1) != !(expr2)) { ... } but this only works if !0 always evaluates to the same value (viz. 1), that is, the optimizer is not allowed to f*ck around with the comparison. !0 is indeed a constant, isn't it? -- I'd rather live in Russia |Maarten Litmaath @ Free U Amsterdam: than in South-Africa... |maart@cs.vu.nl, mcvax!botter!ark!maart