Introduction For C
- C programming is a general-purpose, programming language that has been widely used for developing system software, embedded systems, and many other applications.
- It was developed by Dennis Ritchie in early 1972 at Bell Laboratories and since, it become one of the most popular programming languages in the world.
- System-level tasks like bit-level operations, direct hardware access, and low-level memory manipulation are all handled by this powerful set of features.
- In addition, there are a lot of standard libraries for C that help with input/output, string manipulation, and mathematical operations.
Difference Between C And C++
- C++ was developed as an extension of C, both languages have almost the same syntax.
- The main difference between C and C++ is that C++ support classes and objects, while C does not.
How To Start C Programming
Two way to start C programming:
- A text editors like notepad, to write C program.
- A compiler, like GCC (GNU compiler collection) to translate the c program to computer language.
- Extension for file to save as file_name.c
How To Install GCC In Ubuntu
The default Ubuntu repositories contain a meta-package named build-essential
that contains the GCC compiler and a lot of libraries and other utilities
required for compiling software.
Perform The Steps Below To Install The GCC Compiler In Ubuntu:
1. Open terminal (Ctrl + T)
2. Type command in terminal. Start by updating the packages list.
$ sudo apt update
3. Install the build-essential package by typing.
$ sudo apt install build-essential
The command install a bunch of new packages including gcc, g++ and make.
You may also want to install the manual pages about using GNU/Linux for
development.
$ sudo apt-get install manpages-dev
4. To validate that the GCC compiler is successfully installed, use the gcc
--version command which prints the GCC version.
$ gcc --version
How To Run C Program
=> Now open text editor.
=> Type simple C program in Text editor:
Program:
#include <stdio.h>
int main() {
printf("hello world");
return 0;
}
Output:
hello world
=> Then you will save file as myfirstprogram.c
=> After save this program to open terminal in your program directory.
=> Type command to compile the program.
$gcc myfirstprogram.c -o myfirstprogram
=> After compile a C program then you will type command.
./myfirstprogram
=> Program will be successfully executed.
Some Of The C Header Files:
stdio.h – It defines standard input and output.
stdint.h – It defines exact width integer types.
stdlib.h – It defines standard library.
string.h – It defines string handling functions.
conio.h _ It defines console input and output.
Structure Of C Program
Program 1:
#include <stdio.h>
int main(){
printf("My C program");
return 0;
}
Output:
My C program
Program 2:
#include <stdio.h>
int main() {
int a = 30;
printf("%d", a);
return 0;
}
Output:
30
More topic in C
