Write a C program to simulate Single Level Directory.

Write a C program to simulate Single Level Directory.

Description of File Organization Techniques: The directory contains information about the files, including attributes, location, and ownership. Sometimes the directories consisting of subdirectories also. The directory is itself a file, owned by the operating system and accessible by various file management routines.

a)Single Level Directory

b)Two Level

c)Hierarchical

d)General Graph Directory

Single Level Directories: It is the simplest of all directory structures, in this the directory system having only one directory, it consisting of all files. Sometimes it is said to be the root directory. The following dig. Shows single level directory that contains four files (A, B, C, D). It has the simplicity and ability to locate files quickly. It is not used in the multi-user system, it is used on the small embedded system.

Pic Source: http://www.osinfoblog.com/post/143/directories/

Algorithm for Single Level Directory Structure:

Step 1:Start

Step 2: Initialize values gd=DETECT,gm,count,i,j,mid,cir_x;

Initialize character array fname[10][20];

Step 3: Initialize graph function as

Initgraph(& gd, &gm," c:/tc/bgi");

Clear device();

Step 4:set back ground color with setbkcolor();

Step 5:read number of files in variable count.

Step 6:if check i<count

Step 7: for i=0 & i<count

i increment;

Cleardevice();

setbkcolor(GREEN);

read file name;

setfillstyle(1,MAGENTA);

Step 8: mid=640/count;

cir_x=mid/3;

bar3d(270,100,370,150,0,0);

settextstyle(2,0,4);

settextstyle(1,1);

outtextxy(320,125,"rootdirectory");

setcolor(BLUE);

i++;

Step 9:for j=0&&j<=i&&cir_x+=mid

j increment;

line(320,150,cir_x,250);

fillellipse(cir_x,250,30,30);

outtextxy(cir_x,250,fname[i]);

Step 10: End

/* Program to simulate single level directory */

Program Code:

#include<stdio.h>

#include<conio.h>

#include<string.h>

void main()

{

int nf=0,i=0,j=0,ch;

char mdname[10],fname[10][10],name[10];

clrscr();

printf("Enter the directory name:");

scanf("%s",mdname);

printf("Enter the number of files:");

scanf("%d",&nf);

do

{

printf("Enter file name to be created:");

scanf("%s",name);

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

{

if(!strcmp(name,fname[i]))

break;

}

if(i==nf)

{

strcpy(fname[j++],name);

nf++;

}

else

printf("There is already %s\n",name);

printf("Do you want to enter another file(yes - 1 or no - 0):");

scanf("%d",&ch);

}

while(ch==1);

printf("Directory name is:%s\n",mdname);

printf("Files names are:");

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

printf("\n%s",fname[i]);

getch();

}

Program Output:

Enter the directory name:sss

Enter the number of files:3

Enter file name to be created:aaa

Do you want to enter another file(yes - 1 or no - 0):1

Enter file name to be created:bbb

Do you want to enter another file(yes - 1 or no - 0):1

Enter file name to be created:ccc

Do you want to enter another file(yes - 1 or no - 0):0

Directory name is:sss

Files names are:

aaa

bbb

ccc