C Programming Tutorial - 1 - Introduction
thenewboston
Bucky
Roberts explains how to code in C programming one of the most popular
programming languages in the entire world. C is used to make any software on
your desktop like all of these programs you can make. You can pretty much use
it to program any electronic like robots vending machines stoplights your
microwave could be programmed and C so it 's basically a very widely used
programming language. What this what we 're going to do right here is we're
going to download a piece of software and it 's actually completely free which
is freaking awesome. This one program has every single thing that you need and
like I said free how awesome is that so go to downloads right here and it says
ok you have to choose a couple of options the binary release the source code or
source code from
the SVN.
C Programming Tutorial - 2 - Setting Up Code Blocks
thenewboston
The first thing
I actually want to do is minimize that and well I can click Next finish out of
that and I want to make a folder on my desktop so new folder and this is where
I 'm gon na be putting all of my project files so I'm gon na put C underscore
tutorials tutorials. This is actually a very simple program now I know you guys
don't know what any of this means right now but I do want to show you guys how
to run the program whenever you 're ready so we can actually run this right now
by clicking this little button it 's called a build and run and it takes
actually a couple of steps to run your program the first one is to compile it
or build it pretty much take all of this code the words that we understand in
the translation translates it to once and zeros. The last thing I want to
mention is in these tutorials I 'm gon na be typing a whole bunch of source
code and if you guys just want to like sit back and watch it swirls and then
get the source code later on I'm going to post it on my website so if you go to
my website Bucky 's room org. and if. you click forum then in the c-section
section get it anyways if you just click that right there then of course my
source code isn't posted right now.
C Programming Tutorial - 3 - How Computer
Programs Work
thenewboston
Understanding Computer
Programs
Welcome
back to another tutorial! Before we start coding, let's understand how a
computer program works. A computer program is made up of functions, which tell
the computer what to do. For example, let's say we want to create a program
that watches a YouTube video for us. Here are the functions it would need:
·
Move
the mouse to the Google Chrome icon.
·
Click.
·
Click
on videos.
·
Play
a video.
As
you can see, a computer program is made up of these functions. One important
function that every C program needs is called "main". It is the
starting point of the program. The main function is enclosed in curly brackets,
and each line inside it is an instruction. Instructions end with a semicolon.
When
you run a program, the computer automatically looks for the main function. It
then executes the instructions inside it. In our example, the program would
print "Hello World" on the screen. The line "return 0"
indicates that the function ran correctly.
The
"include" lines in our program tell the computer to include built-in
functions that we can use. These functions allow us to print text on the
screen, among other things.
Blank
lines, indents, and whitespace do not affect the program's functionality. They
are used to make the code more readable.
C Programming Tutorial - 4 - Print Text on the Screen
thenewboston
In this world I 'm going to
be telling you guys how to do a very simple command and that 's just print
stuff out on the screen. So of course go ahead and delete this right here and
give yourself some room to work with I like having a blank line above and below
makes it stand out especially whenever. I'm teaching. slash a actually makes a
sound on your computer. slash t and that just makes it tab so says Bucky is
awesome tab tab tab. slash a is short for alert it pretty much says play your
computer's alarm alert or beef noise so actually run this code in your compiler
and you guys can hear what your computer sounds like..
C Programming Tutorial - 5 - Comments
thenewboston
Sorry
for the interruption, my family came over because of a village-wide garage
sale. Now, let's continue learning about printing on the screen. Our program currently
prints something, beeps, and then prints again. Although it appears to happen
simultaneously, it actually happens sequentially. I also want to explain
comments, which are notes you can put in your program. When the computer
encounters a comment, it ignores it. These comments are useful for reminders or
for collaborating with other programmers.
To
create a comment that spans multiple lines, you can use the /* and */ symbols. Anything between these symbols
will be treated as a comment. For example:
/*This is my program.It prints out my name.It's
awesome!*/
These
comments are typically used above functions or at the top of the program to
explain their purpose.
If
you want to leave a short comment on a single line, you can use two forward
slashes (//).
Anything after the slashes will be ignored by the computer. For example:
// These are the lines that print my name
When
you build and run the program, the comments are removed and do not affect the
program's functionality.
In
the next lesson, I will discuss conversion characters and how they can improve
the printf statement. Stay tuned!
C Programming Tutorial - 6 - Conversion Characters
thenewboston
Alright
guys, now that we understand the basics of how to print on the screen, I want
to talk to you about how to make the print command more powerful using
conversion characters.
In C
programs, we can work with different data types such as numbers, text, and
strings. Strings are basically a group of characters or words.
Let's
make another printf statement that uses conversion characters. The special
symbol we'll use is %s, which is a placeholder for a string. After the first
quotation mark, we can add another string to substitute in that place.
For
example, we can say "%s is the best person ever" and substitute the
string "Bucky" in that place. You can use as many conversion
characters as you want in a printf statement.
Similarly,
we can use %d as a placeholder for a whole number or integer. We can input a
number like 9 and say "I ate %d corn dogs last night".
For
numbers with decimal places, we use %f as a placeholder. By default, it shows
six decimal places. But we can format it to show a specific number of decimal
places by adding a number after the %f, like %0.2f for two decimal places.
So,
for example, we can say "pi is %f" and display it to two decimal
places. We can also show it to four decimal places by using %0.4f.
Conversion
characters are useful for customizing programs and allowing user input. Later on,
I'll show you how to get user input.
