10-31-2002
just a few pointers.. (
)
Unlike pointers, you must immediately initialize a reference:
Quote:
int a = 5;
int* ptr; // OK!
int& x; // Error!
int& y = a; // OK!
Also remember that you can't use an operator to operate on the reference like you can do with pointers. An example...
Quote:
#include <iostream>
using std::cout;
using std::endl;
int main()
{
int a[4] = {12, 8, 543, 74};
int* ptr = &a[2];
int& ref = a[2];
ptr++;
ref++; //Nothing happens to the reference
cout << "reference: " << ref << endl;
cout << "pointer: " << *ptr << endl;
}
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LEARN ABOUT DEBIAN
hostname
FBB::Hostname(3bobcat) Host Info FBB::Hostname(3bobcat)
NAME
FBB::Hostname - Contains name/address info about a host
SYNOPSIS
#include <bobcat/hostname>
Linking option: -lbobcat
DESCRIPTION
FBB::Hostname objects inherit from Hostent, and offers information about a host, like Hostent. Apart from being initialized by a hostname
or host address, they can also be initialized by a FBB::InetAddress object. Most of the functionality of an FBB::Hostname object is avail-
able through its parent-class FBB::Hostent.
NAMESPACE
FBB
All constructors, members, operators and manipulators, mentioned in this man-page, are defined in the namespace FBB.
INHERITS FROM
FBB::Hostent
CONSTRUCTORS
o Hostname():
The default constructor initializes an empty FBB::Hostname object.
o Hostname((std::string const &host)):
This constructor initializes an FBB::Hostname object from a string representing the name or dotted decimal address of a host. An
FBB::Errno object is thrown if the hostname information could not be retrieved.
o Hostname(InetAddress const &inetAddress):
This constructor initializes an FBB::Hostname object from an InetAddress object. An FBB::Errno object is thrown if the hostname
information could not be retrieved. The copy constructor is available.
MEMBER FUNCTIONS
All members of FBB::Hostent are available, as FBB::Hostname inherits from this class. There are no additional members.
EXAMPLE
#include <iostream>
#include <bobcat/hostname>
#include <bobcat/errno>
using namespace std;
using namespace FBB;
int main(int argc, char **argv)
{
while (true)
{
cout << "Enter name or address:
";
string str;
if (!getline(cin, str))
return 0;
if (str == "")
break;
try
{
Hostname h(str);
cout << "Official name:
";
cout << h.hostname() << endl;
cout << "Aliases:
";
for (size_t idx = 0; idx < h.nAliases(); idx++)
cout << h.alias(idx) << " ";
cout << endl;
cout << "Adresses:
";
for (size_t idx = 0; idx < h.nAddresses(); idx++)
cout << h.dottedDecimalAddress(idx) << " ";
cout << endl;
}
catch (Errno const &err)
{
cout << err.why() << endl;
}
}
return 0;
}
FILES
bobcat/hostname - defines the class interface
SEE ALSO
bobcat(7), hostent(3bobcat)
BUGS
None Reported.
DISTRIBUTION FILES
o bobcat_3.01.00-x.dsc: detached signature;
o bobcat_3.01.00-x.tar.gz: source archive;
o bobcat_3.01.00-x_i386.changes: change log;
o libbobcat1_3.01.00-x_*.deb: debian package holding the libraries;
o libbobcat1-dev_3.01.00-x_*.deb: debian package holding the libraries, headers and manual pages;
o http://sourceforge.net/projects/bobcat: public archive location;
BOBCAT
Bobcat is an acronym of `Brokken's Own Base Classes And Templates'.
COPYRIGHT
This is free software, distributed under the terms of the GNU General Public License (GPL).
AUTHOR
Frank B. Brokken (f.b.brokken@rug.nl).
libbobcat1-dev_3.01.00-x.tar.gz 2005-2012 FBB::Hostname(3bobcat)