C Code 20 _ C Program to find whether the given string or number is palindrome or not

C Code 20 _ C Program to find whether the given string or number is palindrome or not

Program:

#include<stdio.h>

int main()

{

    int ch,n,rev=0,r,i,j=0,l=0,s=0,t;

    char c[100],b[100];

    printf("\n* * * * Palindrome or not * * * *\n\n____ Menu ____\n\n1 - check whether the given number is palindrome or not\n\n2 - check whether the given string is palindrome or not");

    printf("\n\nEnter your operation to perform from above menu (1 or 2) : ");

    scanf("%d",&ch);

    switch(ch)

    {

              case 1:

                   printf("\n\n* * * check whether the given number is palindrome or not * * *");

                   printf("\n\nEnter a number : ");

                   scanf("%d",&n);

                   t=n;

                   while(n>0)

                   {

                             r=n%10;

                             rev=(rev*10)+r;

                             n=n/10;

                   }

                   printf("\n\nThe given number : %d",t);

                   printf("\n\nReverse of given number : %d",rev);

                   if(rev==t)

                   {

                             printf("\n\n~ ~ ~ The given number is a palindrome ~ ~ ~");

                   }

                   else

                   {

                             printf("\n\n~ ~ ~ The given number is Not a palindrome ~ ~ ~");

                   }

                   break;

                  

              case 2:

                   printf("\n\n* * * check whether the given string is palindrome or not(with out using inbuild string functions) * * *");

                   printf("\n\nEnter a String : ");

                   scanf("%s",c);

                   i=0;

                   while(c[i]!='\0')

                   {

                        l=l+1;

                        i=i+1;

                   }

                   for(i=l-1;i>=0;i--)

                   {

                        b[j]=c[i];

                        j++;

                   }

                   b[j]='\0';

                   printf("\n\nThe given string : %s",c);

                   printf("\n\nReverse of given string : %s",b);

                   for(i=0;i<l;i++)

                   {

                         if(c[i]==b[i])

                         {

                              s=s+1;

                         }

                   }

                   if(l==s)

                   {

                           printf("\n\n~ ~ ~ The given string is a palindrome ~ ~ ~");

                   }

                   else

                   {

                            printf("\n\n~ ~ ~ The given string is Not a palindrome ~ ~ ~");

                   }

                   break;

                  

              default:

                      printf("\n\nEnter a valid choice - 1 or 2");

    }

    getch();

    return 0;

}

Output:

Thank you ...