An Introduction to Programming

By :- Vishal HiraniB.Tech II year (CSE)

What is Programming?Wiki Definition: The action or process of

writing computer programs.

What is a Computer Program?A sequence of instructions that a computer

can interpret and execute

How Programming Works?A Program tells a computer what to do.

What is a Programming Language?A programming language acts as a translator

between you and the computer.

How to Write a Program?First : you need a computer Second : you need a text editor.-Talking about Linux, you will be using Gedit.

How to run the program?Using a Compiler

Third : Save the file with extension .c example helloworld.c

CompilerA compiler is a special program that processes

statements written in a particular programming language and turns them into machine language or "code" that a computer's processor uses.

For Linux this Compiler is GCCAnd it is the compiler for most Unix based

operating system and many languages`

Algorithm and FlowchartAlgorithm:

-Step by Step method to solve a problem.

-Must include “ALL” required information.Flowchart: -Graphical representation of Algorithm.-Includes Terminal + Process + Decision

Average??

Question: Find the largest of A,B & C

Start

Read A, B & C

Is A>B

Is A>C

Is B>C

Print APrint B Print C

End

YesYes

No

No

No Yes

Starting with LinuxTerminal (Ctrl+Alt+T)Gedit: “gedit”

ProgramCompiler

Output

Hello World!/* Hello World program */ #include<stdio.h> int main() { printf("Hello World");return 0;}

CommentHeader File Main function-Function starts Print functionReturning output-Function ends

Remember the .c extension

Compiler: How to compilegcc filename

Output: How to Run?./filename.out

Assignment