DESCRIPTION¶
str1 and str2 are both bitstrings. The result of the function is a bitstring with the binary-and of str1 and str2, ie. a string in which a bit is set only if both corresponding bits in the input strings are set, too.
USAGE¶
string s1, s2, s3;
s1 = set_bit("", 3); s1 = set_bit(s1, 15);  -> s1 is "( ("
s2 = set_bit("", 3); s2 = set_bit(s2, 4);   -> s2 is "8"
s3 = and_bits(s1, s2);
-> s3 is now "8", ie. a bitstring with bit 3 set only.