C PROGRAM FOR REPLACING STRING

/* C PROGRAM FOR  REPLACING STRING*/

#include<stdio.h>

#include<conio.h>

#include<string.h>

 void main()

 {

          int slen,sublen,newlen,reslen,m,k,i,j,temp;

          char str[40],substr[20],newstr[20],resstr[25];

          clrscr();

          printf("\n\t\t STRING REPLACING");

          printf("\n\t\t ~~~~~~~~~~~~~~~~~");

          printf("\n Enter any string:");

          gets(str);

          slen=strlen(str);

          printf("\n Enter the substring:");

          gets(substr);

          sublen=strlen(substr);

          printf("\n Enter the replacement string:");

          gets(resstr);

          reslen=strlen(resstr);

          j=0;

          k=0;

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

{

         newstr[k]=str[i];

         k++;

         if(str[i]==substr[j])

         j++;

else

         j=0;

if(j==sublen)

{

         k=k-sublen;

         j=0;

for(m=0;m<reslen;m++)

{

         newstr[k]=resstr[m];

         k++;

     }

   }

}

      newstr[k]='\0';

      printf("\n The replaced string is %s",newstr);

      getch();

}

OUTPUT:

                 STRING REPLACING

                 ~~~~~~~~~~~~~~~~~

 Enter any string: RAJ

 Enter the substring: R

 Enter the replacement string: T

 The replaced string is: TAJ