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