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C#.NET
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Why should we
learn aprogramminglanguage ?
Toda
y , we know that almost all of theprocesses that we do or need
in our daily life
is managed by computer , computer is notthat intelligent machine
that can collect
INPUTS , guess the process that you want it todo to get the
OUTPUT . No , it can not do this ,
it needs your orders in each step starting inthe moment that the
program is run to the
moment it is closed in .That is Why you need a programming
language .
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Why should we
learn aprogramminglanguage ?Program
ming language (C# for ex.) translatesthe process which we want
the machine to do
into CODES that the machine canunderstand . Actually , the
computer dont
under stand such a simple process like (1+2)in the way you see
it , it needs this process to
be converted into a number system (Binary)consists of only (0
& 1) , the language doesthis step to enable the machine to run
the
process in the way you planed to .
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Why should we
learn aprogramminglanguage ?
As an E
ngineer , you are supposed to dealwith applications and
operations that you will
need the computer to run . For ex. , the airconditioning systems
, power distribution
control , data processes and a huge amount
of operations are run and controlled bycomputer programs that
made by a
PROGRAMMING LANGUAGE .
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THE PROGRAMNEEDS INPUT ,
A SPECIFIED
PROCESSES , TOGIVE THE
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INPUTINTEGER,CHAR,
FLOAT , SHORT
PROCESS
DIRECT
OPERATIONS+ . - . / , , , %
FLOW CONTROL
COMMANDSIF, FOR, WHILE, DOWHILE , SWITCH
OUTPU
T
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Types of DATA
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My first program :
Hello Egypt !Open your visual studio >> File >> new
>>project
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Choose your settings as shown ,then press OK:
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Namespaces used in theprogram.
The MAINfunctionWrite your code
here !
Namespace : a collection of classes each has a specificfunctions
and methods that you need in the program , thismake the coding much
more simpler as you dont have todefine this functions every time
you need to use them .
Ex. : System.Text (not system.text !) contains classes
thatrepresent ASCII and Unicode character encodings.. Etc.
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Namespaces used in theprogram.
The MAINfunctionWrite your code
here !
Main() : The Method or the BIG function where you put the
codelines you want the program to run . All the code which makesthe
process must be written in it in order to tell the COMBILER
that this is the code of the operation
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Write the program shown , then from the menuchoose , or press ,
see what you get !
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If you has a Very fast eye , youll see this for a second ,If you
have a very fast computer m you will not what ever you
did !
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Change the program to be as following :
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The result will be as the following , this will remain until
youpress the key
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Now , let us make a very little change in the code and run it
:
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When we run the program , we had a different result , just
ablack screen !!
What does that mean ?!!!
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So, lets press and see what will happen !The result CHANGED
..?
Yes !!
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PROCESSES
:1- Process order
The operations are written inthe form of CODE LINES , thiscode
lines are taken in series
while the program is run .The first code run first and so
on .
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End of the first lectureHope it is helpful
Thanks for you timeEng. Ahmed Sakr
[email protected]
