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Re: [Dev-C++] using FLAGS
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From: Per W. <pw...@ia...> - 2006-03-18 13:44:50
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Note - bit-wise and is _not_ the same as logical and. On Sat, 18 Mar 2006, Daniel Pettersson wrote: > A tip. > > double the value for each flag, 1 2 4 8 etc > ex: > 1 + 4 = 00000101 > > to check weither the flag has been set just use "and" ex: check for > 4: isFlagSet = 4 & flags; > > it will become 1 if the flag is set and 0 otherwise isFlagSet will become 4 if the flag is set, else 0. To make it a logical expression (needed if isFlagSett is of type bool, or if the expression is used to count up a variable with 1 if flag is set), the following is needed: isFlagSet = (4 & flags) != 0; /Per W |
