Lecture 5 - Introduction To C

Introduction to C++

C? is it something

is it alien?

No It is not…

You know the things You just never associated them with Programming

History of C++

History • Invented by Dennis Ritchie, from language known as BCPL (called B) • Initially C was used for UNIX operating system. • ANSI C was adopted on Dec. 1989. • ANSI C standard is a base document of the proposed ANSI C++ standard.

C++ is middle level language • Allows manipulation of bits, bytes & addresses. (like system level languages) • Code is portable and easy to adopt. • No runtime error checking (unlike in high level languages) • Keywords (as in high level languages)

C++ as a programmers language • Structured. • Improves reliability of the code. • Used and tested by number of professional programmers. • Can work of systems programming as well as application programming.

Keywords • In computer programming, a keyword is a word or identifier that has a particular meaning to the programming language. • 32 keywords in C. • All in lowercase • e.g. – case, char, default, do, double, for, goto, if, void etc.

Language is same but computer cannot understand it

Language is binary but human cannot work with it

Compiler • Compiler is a software tool that translates source code into data that the computer can understand. • A bridge between, human language and computer language. • We will be using Turbo C++ compiler, commonly known as TC++. • C program will get converted into executable file (.exe)

YOUR FIRST C++ PROGRAM

Hello World Program Keyword

Function

Object

Header File

#include Main () { cout<< “Hello, World!”; }

End of function

Hello.cpp

Hello World Program

Hello.cpp output

C

You Later

Good Night