Introduction to C

History of C

C was developed by a system programmer Dennis Ritchie in 1972, at American Telegraph & Telecommunication (AT & T) Laboratories in New Jersey USA. It was written originally for programming under UNIX operating system. C was developed from BCPL (Basic Combined Programming Language) which was improved and renamed as B. B was developed in 1960’s at Cambridge University.

Table Of Hierarchy Of  Different Languages

C is actually a symbolic instruction code, a set of commands that perform actions on a computer. The C language is often referred as middle-level language because we can write high as well as low programs through C. Languages prior to C are FORTRAN (Formula Translation), COBOL ( Common Business Oriented Language), BASIC (Beginners All Purpose Symbolic Instruction Code) and Pascal. Languages after C are C++, Java, C# etc. C permits very close interaction with the inner working of the computer.

What is C

C is a programming language used to write a program. Programs are the set of instructions given by a programmer to the computer in high-level language. C uses a compiler to translate the high-level program into machine code before executing any instructions. Compiler is itself a computer program. Other translators are Interpreter and Assembler. The original high-level program is called the source program (C.) and the resulting machine language program is called the object program (.obj).

Merits of C

1) C is a general purpose programming language: You can generate games, business software, utilities, mathematical models, word processors, spreadsheets and other kinds of software.

2) C is structured programming language: It uses structured statements such as while, for loops in place of goto statements which cause bugs (error) in the program.

3) System independence: C does not require any services from the operating system, it runs independently. C can run on any operating system.

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