Convert a string to lowercase
String_Type strlow (String_Type s)
The strlow function takes a string s and returns another
string identical to s except that all upper case characters
that comprise s will be converted to lower case.
The function
define Strcmp (a, b)
{
return strcmp (strlow (a), strlow (b));
}
performs a case-insensitive comparison operation of two strings by
converting them to lower case first.
strup, tolower, strcmp, strtrim, define_case