Basic Structure of C Program in Hindi: C Tutorial #4

 

In this tutorial, our focus will be towards the structure of our written program. As a beginner the concept might be difficult for you to understand but do not worry as it happens to everyone, but with time you will develop a good grasp on it. We will be discussing some of the structural parts of our code, such as:

• Pre-processor commands
• Functions
• Variables
• Statements
• Expressions
• Comments

Now we will divide our written program into a few lines of code and one by one we will go over the meaning of each and every keyword in the specific line.

So, let’s begin with Pre-processor commands.

#include <stdio.h>

This is the first line of our code. Any line starting with # represents a preprocessing command. It tells our program that before its execution, it must include the stdio.h named file in it because we are using some of the commands or codes from this file.

For example, if our programs needs mathematical operations of high level them we must include:

#include <math.h>

It helps us to use the code from math.h file for the calculations in our programs.

int main()

this is the 2nd line. main() is function here and we will see the detail about the function in later tutorials. Here int is the return type of function and the return type is according to the functions activity i.e. if it is giving an integer variable as a result then return type should be int.

int a, b;

here we are initializing two variables as integers. Initializing with integer means that we can store integer values in it. If we would have initialized them with char then we could have stored character values in it such as a, b, c, d, etc.  

printf("Enter number a\n");

This is simply a print statement. Whatever we write in the brackets will be directly printed onto the screen. /n is the new line character here.

scanf("%d", &a);

 scanf is used to take inputs from the user. Here &a gives the address of variable “a” to store the user's given value. %d notifies that the value should be of integer type.

printf("The sum is %d\n", a+b);

Here a+b is simply a mathematical addition and  print statement is printing the result onto the screen.

return 0;

we need a return value for a function. The function we created was of int type so it is returning 0. Return 0 means that the function is working perfectly.

Note: Return statement and function type should be same.

//This is a comment

We write comments by using the double slash sign (//). Comments are to notify other programmers the working of the code at specific intervals or we write them for our-self. They do not have any effect on the written program.

Now we are going to write a command in our power terminal window, down below:

   gcc-Wall-save-temps file_name.c -o new_file

Note: Here the file_name is the name of the file we created to write code and new_file is the name we want our executable file to have.

Now I will tell you the benefits of this command. By the help of this command five files will be created namely:

• file_name.i
• file_name.s
• file_name.o
• file_name.c
• new_file.exe

file_name.i will create a preprocessing file where comments are removed, macros are expended and all the code from # files are copied into the file_name.i file with our respective code at the end.

file_name.s will have our code converted in assembly level code

file_name.o will have all the code in  machine level language in binary form.

file_name.c will contain our executable C language code.

new_file.exe is the linker that links all the file_name.o sort of files at on place.

Code add.c as described/written in the video

#include <stdio.h>

int main()
{
    int a, b;
    printf("Enter number a\n");
    scanf("%d", &a);

    printf("Enter number b\n");
    scanf("%d", &b);

    printf("The sum is %d\n", a+b);

    return 0;
}

Code main.c as described/written in the video

#include <stdio.h>

int main()
{
    printf("Hello World\n");
    return 0;
}




Install & Configure VS Code With C Compiler; C language Tutorial #3

In this tutorial we are going to discuss about ide along with compiler and the difference between the two. We will also see the installation of these two in windows as most of the viewers are using windows. I will also show you how to set the path for compiler and by the end of the tutorial you will have an ide linked with a compiler that will help you write your programs efficiently. 

What is an IDE?

IDE stands for Integrated development environment. It is nothing more than an enhanced version of a text editor that helps you write more efficient and nicer code. It helps to differentiate different parts of your codes with different colors and notifying you if you are missing some semicolon or bracket at some place by highlighting that area. A lot of IDEs are available such as DEVC++ or Code Blocks but we are going to use VS Code for this tutorial series.

Compiler: 

A compiler is used to run the program of a

What Is Coding & C Programming Language? C Language Tutorial #2

 

So guys you are on your 2^nd tutorial now, which means that you have chosen to learn C language. This tutorial has three phases. I will discuss each of them in detail with you. So let’s start with the 1^st one.

What is coding?

If we look at the definition i.e. “ coding is the ability to write computer programs”. The definition explains nothing at all, so I am going to explain you in simple words. Coding is a way of communication with the computer. As we know that computer is a dumb machine and it can not work properly until it is provided with instructions. Instructions to the computer are provided using different languages in order for it to do specific tasks.

We have different options i.e. languages through which we can communicate through computer, some of which are low level, that are closer to computer’s understanding i.e. Machine language or C and some are high level that required more processing time in order to transfer the commands or instructions to computer hardware i.e. Python.

Programming or coding is an act of telling the computer, what to do? Without it computer is useless. Programming Languages makes it easier for us to communicate to computer because they work as an intermediary language that both computers and humans can understand.

In 2^nd phase we are briefly going to cover the history of C.

History:

C language was developed by Dennis Ritchie in 1972. At that time, he was working at bell laboratories of AT&T. AT&T is an American multinational conglomerate holding company. It wasn’t the first programming language as before it B, BCPL were being used but there we a lot of problems related to those language and they weren’t that much easier to use. After the introduction of C in the tech industry, it soon got fame without any promotion or advertisement of any sort and till now it is being used widely.

The third thing we will be discussing in this tutorial is our Course and its designed.

Course Content:

This is a unique course as this is specially designed keeping in mind the welfare of the viewer. This course is going to help you the most if you see it in sequence as all of the videos are designed in a way that will start you off from a beginner’s level and take you to an expert level.

The starting topics are easy and simple such as data types, operators, if else statements, etc. but yet well explained as they are the basis of the language. Then we move on to the intermediate topics such as Strings, Arrays or pointers and at the end we will move towards the most advance topics such as File I/O or Function Pointers, etc.

There are also a lot of exercise included in these tutorials, so you might test your skills or learnings and can also evaluate your performance.

Summary:

This course is going to make you an expert level C programmer if you take it seriously and it is also going to help you with other languages as C++, which is very much like C. If you have learned C than you have learned about 60-70% C++. It will also help you with Python as moving towards a simpler language is more easier.

 

Why Learn C Programming Language? C language Tutorial #1

 

So guys, welcome to the first Tutorial of C Programming Playlist. In this tutorial we are going to discuss the benefits of C programming and why should you choose to learn it, while giving you an insight in the language.

I am not going to go over the technical terms that aren’t going to help you in any way, like its release date or about the inventor, but I am going to provide you the knowledge that will help you make your mind, whether you should learn C programming or not.

What is C:

C is one of the fastest programming language as it is close to low-level languages such as Assembly language. If you are already familiar with programming, then you must know the demand out there for a C programmer. Because C comes in handy in case of all the applications that require fast processing, such as games, or major parts of different operating systems.

Benefits of C:

C was developed in early 1970’s but it is still in much demand and it doesn’t seem it is going anywhere, there are a lot of reasons for that such as:

• C takes only significant CPU time for interpretation. That is why a lot Python libraries such as NumPy, pandas, scikit-learn, etc. are built using C.
• Being close to Machine language, some of its functions including direct access to machine level hardware APIs
• It is a highly portable language
• Data structure and algorithm can be better implemented in C language, as you can see in my Data Structures and Algorithms Course  comming soon.
• C is being used to support other programming languages to enhance their efficiency.

Scope:

Let’s talk about the scope of C, so you may know that you are not wasting for time with this Playlist. C has a wide range of scope

• Windows, Linux, Mac all are mostly written in C. Linux is written 97% using C.
• C has also been used widely while creating iOS and Android kernels.
• MySQL database is written using C.
• Ruby and Pearl are mostly written using C.
• Most part of Apache and NGINX is written using C.
• Embedded Systems are created using C

Control:

C gives most of the control in the hand of users. Things like memory allocation and manipulation are totally in the hands of the programmer. Being a flexible language, it provides more access to the programmer because of which it is more efficient.

All of these reasons make C one of the widely used Programming language having special respect in the heart of programmers.

Summary:

C is not a hard language to learn and along with that it stills has a scope in the future. It is a low-level programming language that makes it more efficient and swifter. So many devices and applications are build completely or partially using C, so there is a wide range of options related to field you want to get into.