.\" ident @(#)isalnum.3
.\" Standard Template Library
.\" $$RW_INSERT_HEADER "slyrs.man"
.TH isalnum 3C++ "02 Apr 1998" "Rogue Wave Software" "-"
.ce2
Standard C++ Library   
Copyright 1998, Rogue Wave Software, Inc.   

.SH NAME

\f2isalnum\fP

\ - Determines if a character is alphabetic or numeric.



.SH  SYNOPSIS


.br
#include <locale>
.br
template <class charT> 
.br
bool isalnum (charT c, const locale& loc) const;



.SH  DESCRIPTION


The isalnum_function returns \f2true\fP if the character passed as a parameter is either part of the alphabet specified by the locale parameter or a decimal digit. Otherwise the function returns \f2false\fP.   The check is made using the \f2ctype\fP facet from the locale parameter. 



.SH  EXAMPLE



.br
//
.br
// isalnum.cpp
.br
//
.br

.br
#include <iostream>
.br

.br
int main ()
.br
{
.RE
.RS 1
using namespace std;
.RE
.RS 0

.RE
.RS 1
locale loc;
.RE
.RS 2

.RE
.RS 1
cout << isalnum('a',loc) << endl;
.br
cout << isalnum(',',loc) << endl;
.RE
.RS 2

.RE
.RS 1
return 0;
.RE
.RS 0
}



.SH  SEE ALSO


other_is_functions, locale, ctype