> Leap year

Leap year; every fourth year, in which a day is added to the month of
February on account of the excess of the tropical year (365 d. 5 h.
48 m. 46 s.) above 365 days. But one day added every four years is
equivalent to six hours each year, which is 11 m. 14 s. more than the
excess of the real year. Hence, it is necessary to suppress the
bissextile day at the end of every century which is not divisible by
400, while it is retained at the end of those which are divisible by
400.

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> 1 What is TCP/IP?

It stands for Transmission Control Protocol/Internet Protocol, the
suite of communications protocols used to connect hosts on the
Internet.

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> 1> What is emacs?

Emacs is a text editor and more.

        http://www.gnu.org/software/emacs/emacs.html

and
        http://www.emacswiki.org/cgi-bin/wiki

> 2> What  should  be  our  next stepafter  we  login in  telnet 192.168.0.254?


Create directory (only once), by issueing following command:

mkdir ece9

Change directory. by issueing following command:

cd ece9

Write program using Emacs, by issueing following command:

emacs myfirst.cpp

and so on ... (Refrer class notes)

> 3> What  should  be done  to  find  c++ in the system?

Nothing. After finishing program typing (Save and exit by pressing 
ctrl C  ctrl X) issue command:

g++ myfirst.cpp

> 4>What is linux/unix?

Name of Operating  System.

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> q1:what is the diffreance between the function void main() and int main()?

You must use second option, it provide feedback to calling program while
first provide no feedback.

q2:how do we save the edited text on vi editor?

Escape :x RETURN

q3:if is don't use int main() function then what should i write in place of
return 0?

Nothing

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