Introduction to c programming

Introduction of
C Programming
www.programmingcampus.com


What is Programming Language?

• An artificial language used to write instructions that can
be translated into machine language and then executed
by a computer.

• There are many programming languages. Like C, C++,
Perl, BASIC, COBOL, Java, etc.


Types of Programming Language

• Programming languages are fall into three broad
categories.

• Machine Language.

• Assembly Language.

• High level Language.


Machine Language

• Machine Language is basically the only language which
computer can understand.
• machine code, which is represented inside the computer
by a String of binary digits (bits) 0 and 1.
• The symbol 0 stands for the absence of Electric pulse
and 1 for the presence of an electric pulse .

• For Example:
• 1 is written in machine language as 0001.


Assembly language

• It was developed to overcome some of the many
inconveniences of machine language.
• in which operation codes and operands are given in the
form of alphanumeric symbols instead of 0’s and l’s.
• These alphanumeric symbols will be known as
mnemonic codes and can have maximum up to 5 letter
combination

• For example:
• ADD – Addition
• SUB – Subtraction.

High-level Language

• High level computer languages give formats close to
English language.
• High-level languages are basically symbolic languages
that use English words and/or mathematical symbols
rather than mnemonic codes.
• Each instruction in the high level language is translated
into many machine language instructions thus showing
one-to-many translation.


Introduction to C Programming

• It is developed by Dennis Ritchie in 1970 at Bell Labs.
• In 1983 American National Standards Institute(ANSI)
appointed a technical committee to define a standard for
C.
• The committee approved a version of C in December
1989 which is now known as ANSI C.
• Used to develop UNIX.


Basic Structure of C program

• Documentation section
• Link section
• Definition section
• Global declaration
• main() Function section
{
Declaration part
Executable part
}
• Subprogram section

• Document Section
It consists a set of comment lines giving program
details.
• Link Section
It provide the instruction to the compiler to link
function from the system library.
• Definition Section
It define all symbolic constants.
• Global Declaration Section
It declare variable & function global which can be
use in entire program. We can use them more than one
function.

• main() function section
– This section content two parts..Declaration part & Execution part.
– Declaration part declare all variables used in execution part.
• Subprogram Section
– Subprogram section contain all the user define functions which
are called in main() function.


Simple C Program

#include<stdio.h >
void main()
{
printf(“ProgrammingCampus”);
}

Output:
ProgrammingCampus


Introduction to c programming

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