Program : 11

PROGRAM - 11

a)  Write a program that uses function to perform the following operations:

ü  To insert a sub-string in a main string at a specified position.

ü  To delete N characters from a given string from a specified position.

Program for insert a sub string in main string at a specified position:

#include<stdio.h>

#include<conio.h>

#include<string.h>

main()

{

     char mstr[20],sstr[20],rstr[20];

     int i,j,p,c=0;

     clrscr();

     printf("enter the main string:");

     gets(mstr);

     printf("enter the sub string:");

     gets(sstr);

     printf("enter the position to insert the 

                                    sub string");

     scanf("%d",&p);

     for(i=0,c=0;mstr[i]!='\0';i++,c++)

     {

        if(i==p)

        {

          for(j=0;sstr[j]!='\0';j++,c++)

          {

            rstr[c]=sstr[j];

          }

        }

        rstr[c]=mstr[i];

     }

     rstr[c]='\0';

     printf("the resultant string is %s",rstr);

     getch();

}

/*

INPUT:

enter the main string:WELCOMELAB

enter the sub string: TO CP

enter the position to insert the sub string7

OUTPUT:

the resultant string is WELCOME TO CPLAB

*/

Program for to delete n characters from a given string:

#include<stdio.h>

#include<conio.h>

#include<string.h>

main()

{

     char str[50],str2[20];

     int n,p,k=0,i;

     clrscr();

     printf("enter the string:");

     gets(str);

     printf("\nenter the position from 

                    where to delete:");

     scanf("%d",&p);

     printf("\nenter the number of characters 

                              to delete:");

     scanf("%d",&n);

     for(i=0;str[i]!='\0';i++)

     {

         if(i==p)

         {

           i=i+n;

         }

         str2[k]=str[i];

         k++;

     }

     str2[k]='\0';

     printf("resultant string is %s",str2);

     getch();

}

/*

INPUT:

enter the string:welcome to cplab

enter the position from where to delete:7

enter the number of characters to delete:4

OUTPUT:

resultant string is welcomecplab

*/

b)  Write a program to determine whether the given string is palindrome or not.

Program to find the given string is palindrome or not:

#include<stdio.h>

#include<conio.h>

#include<string.h>

main()

{

     char str[20],s[20];

     clrscr();

     printf("enter the string");

     gets(str);

     strcpy(s,str);

     strrev(s);

     if(strcmp(str,s)==0)

     printf("the entered string is palindrome");

     else

     printf("the entered string is not palindrome");

     getch();

}

/*

INPUT:

enter the string MADAM

OUTPUT:

the entered string is palindrome

INPUT:

enter the string WELCOME

OUTPUT:

the entered string is not palindrome

*/