The document discusses C programming language including its history, advantages, structure of C programs, and how to write and compile C programs. It notes C was created in the 1970s and influenced by other languages. Advantages include modularity, portability and speed. The structure includes preprocessor statements, global declarations, the main function. Compiling involves preprocessing, compiling to assembly code, assembling to object code, and linking to create an executable file. Examples of a sample program, compilation errors and successful compilation are provided.

1. 1. INTRODUCTION TO C LANGUAGE
2. ADVANTAGES OF C LANGUAGES
3. STRUCTURE OF C PROGRAM
4. WRITING AND COMPILING C
PROGRAM
Introduction to C
Language

2. Introduction to C Language
 The C programming language was designed by
Dennis Ritchie at Bell Laboratories in the early 1970s
 It was influenced by the following programming
languages:
 ALGOL 60 (1960),
 CPL (Cambridge, 1963),
 BCPL (Martin Richard, 1967),
 B (Ken Thompson, 1970)

3. Advantages Of C
 Modularity
 General Purpose Programming Language
 Middle Level Language
 Portability
 Speed Of Compilation

4. Disadvantages Of C
 Lack of OOP features
 No Namespace features
 No concept of constructor and destructor

5. Interpretation
 Interpretation and compilation are different ways of
translating high-level languages.
 Interpreter is program that executes program
statements
 Generally execute one line/command at a time
 Limited processing power
 Easy to debug, make changes, view intermediate
results
 Languages: BASIC, LISP, Perl, Matlab, C-shell

6. Compilation
 Translates statements into machine language
 Does not execute, but creates executable program
 Change requires recompilation
 Languages: C, C++, Fortran, Pascal

7. Structure Of C Program

8. Documentation:
o Name of the programmer
o Other detail about the program which the
programmer think can be useful later
Preprocessor Statements:
o Begins with # sign.
o Command to include header files or symbolic
constant before compiling the program

9. Global Declarations:
Declaration of function or the global variables.
Main Function:
Execution starts from here

10. Compiling C Program
 Preprocessing:
Read source code and evaluate preprocessor part.
 Compiling:
Convert source code to assembly code
 Assembling:
Create object code.
 Linking:
Link above object code files and other library files to
produce one complete executable file.

11. Compiling C Program

12. Sample C Program

13. Compiling C Program

14. Unsuccessful Compilation

15. List of Errors

16. Successful Compilation

17. Running the Program

18. Output