How can I remove a flag in C?

Question

There is a variable that holds some flags and I want to remove one of them. But I don\'t know how to remove it.

Here is how I set the flag.

my.emask          


        

Answer 1

It's important to note that if the variable being manipulated is larger than an int, the value used in the 'and not' expression must be as well. Actually, one can sometimes get away with using smaller types, but there are enough odd cases that it's probably best to use type suffixes to make sure the constants are large enough.