History of C-Language

-






 C is one of the most famous computer languages. The history of C language is

1. C language was derived from the earlier language B. B is derived from BCPL(Basic Combined Programming Language). BCPL was derived from ALGOL (Algorithmic Language).


2. The name C is given to this Language because it was derived from B (C was successor of B).


3. C is a programming language which is born at "AT & T's Bell Laboratory" of USA in 1972.


4. C was written by a person called Dennis Ritchie, that is why he is also called as father of C.


5. C-anguage was created for designing the UNIX operating system (which is currently base of many UNIX based OS).


6. It's use quickly spread beyond Bell Labs in the late 70's because of its powerful features.

Comments

Post a Comment

Popular posts from this blog

Structure of C-Language

-
Image
Now let us combine all the above three sections/parts to make a complete C program. =>/* Program to print hello world*/ #include<stdio.h>     /*link section*/ Int main()                   /*main function*/ {       Printf(“Hello world”);       Return 0; } Output: -  Hello world Note: - only link and main function sections are compulsory. Documentation section is optional. The various sections/parts of a C program are:- 1)  Document section :-  Gives the brief explanation of the program, author,date written etc….. 2)  Link section :- Include header files with #include statements. 3)  Definition section :- variables and initializes them using # define. 4)  Global declaration section :-   The  variables used throughout the program are declared. 5)    Function Protot...
Read more
-
Image
Programming Style of C Language :-   The style of a C Language describes how to use various elements of C language to increase clarity, readability and understandability of c programs. Various elements that are included to describe c-style are:- 1.Names. 2.Spaces. 3.Line Breaks. 4.Comments. 5.Indentation. 6.Blank lines. 7.Braces. 1.Names : Use Meaningful names for File names. Variable names. Function names. If two (or) three words are used in names, combine them with Underscores. File name should have an extension .c. Function name should be terminated with() Examples: Sum_of_two_numbers.c. file1.c, calendar.c                  /* File names */ Area_of_circle, x. y. z                     /* variable names */   Print_address().read_data(), calc_interest()        ...
Read more
-
Image
Execution of the C Program:-   Developing a program in a compiled language such as C requires at least four steps: 1. Editing (or writing) the program. 2. Compiling. 3. Linking. 4. Executing.   Step 1: Editing : (in turbo C Compiler use the command TC filename.c at dos (prompt)          1. Write C program using Text Editor. Such as Notepad or Turbo C editor.         2. Save program with an extension .C (F2 in Turbo C)         3. File saved with .C extension is called as Source Program.   Step 2: Compiling : (In turbo C compiler use Alt + F9 Key)   1.  Source Program with an extension .C is given as input to Compiler. 2.   Compiler checks for errors, if source code contains errors then goto step1 to modify the source program. 3.  If source code is error free then Compiler Converts it into Object file with an extension obj and...
Read more