"Hello, world!" program||hello world

-
This post will describe writing the first "hello world" C program using a compiler.Here i am using codeblocks as a compiler tool.You can use any other compiler if you want.A detailed post about various compilers will be given in the next blog post.

Here are few things that this post is all about.This post will be covering all the detailed explanation of how to:
  •  Write a c program:how to write the program in the compiler
  • Its basic components:components here is mainly the syntanx and the function used in the program.
  • How to compile and run the c program:this section will deal with compiling and running the program.I have include links for some compiler you can check out if you don't have any compiler.
  • Output of the given program: as always in the last we are going to see the output of the given program on the screen.
This is the simplest program of the c language.The reason why i have included it here is as it is the first program of the c language and i want to provide information about c from the very beginning i,e the basics.

Now before we get down to our business of writing the program let's just first see the basic components i,e the basic syntax used in every c program and know about them in very short.A detailed study of each function will be updated in few days.Till then let just know about them.

As said basic component these are the main parts of a c program and almost every C program have all these component in it

If you dont want to see the basics the directly jump to the program.

Basic component to write any c program:-


Here "#" is a preprocessor.
As the name suggests it is used by compiler to process the source program              before passing to it.
Here stdio.h stands for standard input output.It is a basic function used by the OS to understand about input and output of the  program.    

  • main functon
It defines the whole body of the c program and the main program is written inside it.A detailed information about this function will be given in the future post.Till then just remember it is used to write the programs into.I

 It is the syntax used in c programming that is used to get output of the program   on the screen.

We have not told in this segment the int used before the main function.Actually int is a data type and so we will see about the different data types in future posts.
Also the return statement is used to return any value to the main function.

The c program to print "hello world" on the screen:


and the desired output is:


As i have said earlier i am using codeblocks recently so all my programs and it's code will be based on the codeblocks compiler only.

NOTE:-The thing here that is to be noted is that the syntax used in c language are all small letters.As you can see each word is in small letter except the "hello world".The point should be noted that the words written inside the quotes of printf function is displayed on the screen and so it can be written in any format.But the other things in the program must be in small letters.

What are the various steps required in compiling and running any program?:

Here are the basic steps that are required in writing and executing the program:
  • writing the program
  • compiling the program and to check for any errors.
  • building and running the program
  • getting the desired output.                                                                     

 In the upper steps the step no.2 and 3 are done in the compiler and how to use the compiler will be posted in the next blog post.    

  How to compile and run the program

      
There are various ways to compile and run the c program;

There are numerous of compiler present on the internet just go to any of them and download it.Write your program in the compiler and run the program to get desired output.

 I am giving here link to download one of them which i prefer over the rest:

Also there are many online compiler present where you can directly create an online program and compile and run it.
Here is a link to one of the online compiler:

 Well i am attaching here a link to my video explaining how to write this program and execute it:-


.

Reference:-Internet(wikipedia)






Comments

Post a Comment

Popular posts from this blog

scanf in c

-
Image
So what is scanf function in C? What is the use of scanf function in C language? In this post we are going to see the detailed explanation about scanf function and its use in writing a C program. The scanf function is a library function .Library functions are by default declared in the C language. Scanf function in c allows compiler to accept the input given by the user using keyboard and is often referred to as counter part of printf function because printf function is used to display output on the screen whereas it takes input. For us to be able to use scanf() function,it is necessary to use #include<stdio.h> at the beginning of the program.As discussed earlier it is a preprocessor directive and it's objective will be discussed later.For now just remember to use it wherever you are using scanf() function. In C programming the scanf() function is used to read different type of data.The different type of data includes integer,real,character.It is also used t...
Read more

Clash of clan best strategy for farming and attacking

-
Image
                          So telling about me I am also a coc player.Today in this post I am going to share some of the strategies and defence techniques to gain more trophies at th8 base. So let's start.....  1 . DEFENCE The foremost thing in a base to gain more trophies is to have a good defence. You should never rush while playing.I know there are some time when we think that might upgrading the townhall is good idea but it is not. To gain more and more trophies we should first upgrade our defences to the max level of that townhall. Now how to upgrade effectively for defence:- First upgrade defence buildings Secondly upgrade all the resource buildings as it gives advantage because upgrading the building increases it's hitpoint. Next, your base design must be good.Search some site for good base designs. 2. TROOPS AND SPELLS After defence the second most important thing for a good bas...
Read more