The document discusses the features and structure of the C programming language, developed by Dennis Ritchie as an evolution from the B language. Key characteristics include portability, modularity, and support for bit-wise operations, making C a middle-level structured programming language. It explains the basic structure of a C program, which must include the main() function and emphasizes that all statements end with a semicolon.

1. Computer
Programming And
Utilization

2. FEATURES OF ‘C’
O Denis Ritchie developed ‘C’ language . Previous
version was known as ‘B’ language.
O Important feature of ‘C’ language is it is portable,
portability we mean that program can be run on
any hardware machine.
O Other features are it is modular language,
supports bit-wise operations and does not
provide input-output statement.
O The bit-wise operations allow the programmer to
do the operations on data bit by bit , which is a
feature of machine language. Because of this
facility ,’C’ is known as MIDDLE LEVEL
LANGUAGE

3. O The other important feature of ‘c’ program is that
it is modular.
O The large problem is divided into small sub
problems.
O Each module is individually approached as
separate sub problem and solution is found.
O Then all the module are put together and the
solution of the large problem is derived .
O Because of the modularity support ,’c’ language
is also called as structured programming
language

5. STRUCTURE OF A ‘C’
PROGRAM
O Every ‘C’ program has to follow specific
structure of ‘c’ program must have at least
one function called main().
O The main() function has to control over the
other part of program.
O Execution of the program start from the
main() function.
O The ‘C’ program structure is given below:-

6. STRUCTURE OF A ‘C’
PROGRAM
Documentation
Header file section
Constants and Global variables
main ()
{
Statement(s)
)
User defined functions and procedures with their body

7. STRUCTURE OF A ‘C’
PROGRAM
Program:
/*Write a program print the message
Hello !*/
#include<stdio.h>
void main( )
{
printf(“Hello !”);
}

8. STRUCTURE OF A ‘C’
PROGRAM
Output :
Hello !

9. STRUCTURE OF A ‘C’
PROGRAM
O The line #include<stdio.h>includes the
header file named as stdio.h. This file is
necessary to be included in our program
whenever we are doing input–output
operations.
O The next line is void main() which includes
the main() function. The void keyword
indicates it does not return any value of
operating system.

10. O Within the brackets {and} the body of main()
function is written.
O The symbol { indicates start of the main
function, while symbol } for the end of the
program.
O The satement printf(“Hello!”);actually prints
the
Hello !
message on the screen.
O In ‘C’ all the statements must be terminated by
semicolon’;’ symbol.That is the reason why
there is semicolon after printf(“Hello!”).

11. Explanation of parts of ‘C’ program