An Introduction to Programming

1. An Introduction to Programming By :- Vishal Hirani B.Tech II year (CSE)

2. 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.

3. How to Write a Program? • First : you need a computer • Second : you need a text editor. -Talking about Linux, you will be using Gedit. • Third : Save the file with extension .c example helloworld.c How to run the program? • Using a Compiler

4. Compiler • A 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 GCC • And it is the compiler for most Unix based operating system and many languages`

5. Algorithm and Flowchart • Algorithm: -Step by Step method to solve a problem. -Must include “ALL” required information. • Flowchart: -Graphical representation of Algorithm. -Includes Terminal + Process + Decision

7. Average??

8. Question: Find the largest of A,B & C Start Read A, B & C Is B>C Is A>B Is A>C Yes No Yes Yes No Print B Print C Print A No End

9. Starting with Linux • Terminal (Ctrl+Alt+T) • Gedit: “gedit” • Program • Compiler • Output

10. Hello World! /* Hello World program */ #include<stdio.h> int main() { printf("Hello World"); return 0; } Comment Header File Main function -Function starts Print function Returning output -Function ends Remember the .c extension

11. Compiler: How to compile gcc filename

12. Output: How to Run? ./filename.out

13. Assignment