Character Stuffing Program

/*Program For Character Stuffing*/

#include<stdio.h>

#include<conio.h>

#include<string.h>

#include<process.h>

void main()

{

int i=0,j=0,n,pos;

char a[20],b[50],ch;

clrscr();

printf("enter string\n");

scanf("%s",&a);

n=strlen(a);

printf("enter position\n");

scanf("%d",&pos);

if(pos>n)

{

printf("invalid position, Enter again :");

scanf("%d",&pos);

}

printf("enter the character\n");

ch=getche();

b[0]='d';

b[1]='l';

b[2]='e';

b[3]='s';

b[4]='t';

b[5]='x';

j=6;

while(i<n)

{

if(i==pos-1)

{

b[j]='d';

b[j+1]='l';

b[j+2]='e';

b[j+3]=ch;

b[j+4]='d';

b[j+5]='l';

b[j+6]='e';

j=j+7;

}

 if(a[i]=='d' && a[i+1]=='l' && a[i+2]=='e')

  {

    b[j]='d';

    b[j+1]='l';

    b[j+2]='e';

    j=j+3;

  } 

b[j]=a[i];

i++;

j++;

}

b[j]='d';

b[j+1]='l';

b[j+2]='e';

b[j+3]='e';

b[j+4]='t';

b[j+5]='x';

b[j+6]='\0';

printf("\nframe after stuffing:\n");

printf("%s",b);

getch();

}

INPUT:

enter string:

asdlefgh

enter position: 8

invalid position,enter again: 3

enter the character: k

OUTPUT:

String after stuffing:

dlestx as dle k dle dle dlefgh dleetx

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