C Program 13

13. Check for palindrome string/number.

 

#include <stdio.h>

int main()

{

   char str[50], i=0;

   int str_len;

   int number, t, rev=0, rmndr, ch;

   clrscr();

   printf("Enter your choice\n");

   printf("Enter 1to Check for palindrome string\n");

   printf("Enter 2 to Check for palindrome number\n");

   scanf("%d",&ch);

   if(ch==1)

   {

    printf("Please enter a word to check Palindrome : ");

    scanf("%s",str);

    printf("\nEntered word: %s", str);

    while(1)

     {

      str_len = strlen(str) - (i+1);

      if (str[i] == str[str_len])

       {

         if (i == str_len || i+1 == str_len)

                               {

            printf("\nEntered word \"%s\" is a palindrome", str);

            break;

                               }

         i = i+1;

       }

 

                             else

       {

         printf("\nEntered word \"%s\" is not a palindrome", str);

         break;

       }

     }

     }

 

   else

   {

   printf("Please enter a number to check Palindrome : ");

   scanf("%d",&number);

   printf("\nEntered number: %d", number);

 

   t = number;

 

   while (number > 0)

   {

      rmndr = number%10;

      rev = rev*10 + rmndr;

      number = number/10;

   }

   printf("\nReversed number: %d", rev);

 

   if(t == rev)

   {

      printf("\nEntered number %d is a palindrome", t);

   }

   else

   {

      printf("\nEntered number %d is not a palindrome", t);

   }

   getch();

   return 0;

 }

getch();

}