E F

Generating Various Patterns Using Loops

raghavendra442@gmail.com (Ragav) — Fri, 26 Oct 2012 09:59:00 +0530

M Pattern

Code :

main()

{

int i,j,n;

printf("Enter n:");

scanf("%d",&n);

for(i=0;i<n;i++)

{

Operators In 'C' :

raghavendra442@gmail.com (Ragav) — Mon, 22 Oct 2012 11:36:00 +0530

Assignment (=)
Case :- Lvalue Error

main()
{
int a = 10 , b = 20;
printf("a=%d b=%d\n",a,b);
b= ( a*b/a=b );
printf("a=%d b=%d\n",a,b);
}

Behavior of variable data in c and floating point data representation

raghavendra442@gmail.com (Ragav) — Sun, 7 Oct 2012 14:45:00 +0530

Data Type	Format Specifier	Size( In BYTES)		Range
Integral Data

Is main() function A Mandatory In C Programming ?

raghavendra442@gmail.com (Ragav) — Sat, 6 Oct 2012 22:11:00 +0530

Every ' C ' Program Must Contain A Function , At least One :
It doesn't Mean That It Must be main() Function.

A Statement, For Execution Must Be The Part Of A Function Block.

Case :- 1

# include<stdio.h>
printf( " Before Function \n" );
main()
{
printf( " In Function \n" );
}
printf( " After Function \n" );

O/P :- Results In An ERRORS .
(As The Statements printf( " Before Function \n" ); and printf( " After Function \n" ); are not part of Function block They Result In Errors)

Directory Structure and basic commands to start using linux

raghavendra442@gmail.com (Ragav) — Thu, 4 Oct 2012 00:03:00 +0530

Directory Structure In 'Linux' :

' / ' - Root Mount Point

' ~ ' - Home Directory For User

' . ' - Reference To Current Directory

' .. ' - Reference To Parent Directory Of Current Directory

Purpose Of The Above Directories:

root :
Like Administrator In Windows.

Install virtual Linux(fedora14-i386) In Windows XP host

raghavendra442@gmail.com (Ragav) — Sun, 30 Sep 2012 20:27:00 +0530

Installing Linux host(fedora 14) in Windows XP guest system with following configuration:

1024+256 MB RAM

80 GB HDD

Single step compilation of a program

raghavendra442@gmail.com (Ragav) — Sun, 30 Sep 2012 20:09:00 +0530

Steps Of Program Compilation In Respective Order :

1.Pre-processor
2.Translator
3.Assembler
4.Linker
5.Loader

1. Pre - Processor :

--> I st Stage In Multistage Compilation.
--> It Works Directly On Source File.
--> Converts Input Source File ('.c' etc) To Expanded Source File('.i') .

Where '.i' File Is A Source File ,Which Is :

Native Compiler Vs Cross Compiler

raghavendra442@gmail.com (Ragav) — Sun, 30 Sep 2012 16:54:00 +0530

If A Compiler Helps To Convert The Source Code To Binary Code , Where The 'Target CPU(CPU Where The Binary Code Is Actually Meant To Be Used)' And 'Origin CPU (CPU Where The Code Has Been Generated And Compiled' Are Same , Is Called Native Compiler.Other Wise Its Understood That We Are Using A Cross Compiler .

Examples Of Native Compilers:
TURBO 'C'

Why 'C' or a high level language In Embedded System Programming?

raghavendra442@gmail.com (Ragav) — Thu, 27 Sep 2012 22:44:00 +0530

'C' Is A High Level Language Which 'Processor/CPU' Can Not Understand . But Many Embedded Programmers
Use 'C' In Embedded Systems , Why?

If A Code Is Written In A Specific Instruction Code From An Instruction Set Which Is Understandable Only By The Specific Processor/CPU Then It Causes A Problem When There Is A Need For Migration Of Hardware i.e; If CPU Has To BE Replaced By A More Sophisticated CPU The Code Has To Be Rewritten Using The Instruction Set Supported By The New CPU.

What Is An Embedded System?

raghavendra442@gmail.com (Ragav) — Thu, 27 Sep 2012 22:26:00 +0530

An Embedded System Is A Subsystem , Actually Designed To Support A Real Time System.
Embedded System Is Embedded In A Bigger System .
For Example:

A "Temperature Sensor" Used To Sense Temperature In The Room And Regulate The Blower Of The Air Conditioner Can be Considered As An Embedded System.

LIMITATIONS TO DESIGN AN EMBEDDED SYSTEM :