C language is very easy and a powerful computer programming language bbecause it is very small and structured.

C language is a Middle level language i.e. suitable for systems programming.

It is a case sensitive language.  It is highly portable language. C is a procedural or sequential language. It is easy to learn and understand. It is a small language

INTRODUCTION TO C

C language was invented by DENNIS RITCHIE at Bell Laboratories in between 1969 1nd 1973.

C language was standardized by ANSI in 1989  and known as ANSI C.

HISTORY

C INFLUENCED BY

 Portability- C is a machine independent and highly portable language.

Robustness- C has a set of built in functions and operators.

Easy to understand and learn as it has only 32 keywords.

Fast and Efficient Flexible- It is not only for system but also for

embedded system commercial data processing. Integration with UNIX. C has a large library of functions.

CHARACTERSTICS

Complexity- Difficulty in solving complex problems.

Difficult to debug. Difficult to modify. Error-prone Diffficult to write large programs.

LIMITATIONS

Character set Data Types Constants Keywords Variables Grammer(Syntax & semantics

COMPONENTS OF C

Documentation Section (optional) Link Section (optional) Defining Section (optional) Global Declaration Section (optional) Main Function Section ( )                       {                                Declaration part                                Executable part                        }  Subprogram Section (optional)  Function 1  Function 2  Function n

STRUCTURE OF C

 /* This is a sample C program. */#include <stdio.h>#include <conio.h>main ( ){ clrscr ( ); printf (“Hello \n”); getch ( );}

EXAMPLE

C program is executed in 3 phases:  Create a source code file.  [Empty file(input) – Source Code

file(output)] Compilation       [Source code file(input) – object

file(output)] Linking      [Object File(input) – Executable File

(output)]

PROGRAM EXECUTION 

PROGRAM EXECUTION

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