IGNOU BCA 2nd sem Solved Assignment - Writer an interactive C program to check whether the given string is a palindrome or not, using pointers.

Writer an interactive C program to check whether the given string is a palindrome or not, using pointers.

Ans

void main()

{

// get the number to check

long int n;

printf("ENTER A NUMBER: ");

scanf("%ld",&n);

long int n1,mod;

// make a copy of the original number in n1

n1=n;

// store the reversal in rev

long int rev=0;

while(n>0)

{

// grab the rightmost digit of n

mod = n%10;

// shift all digits of rev left, then add in the new digit

rev = rev * 10 + mod;

// shift all digits of n to the right (removing the rightmost one)

n = n / 10;

}

// after the loop, rev will have the opposite digit ordering of n1;

// if these two values are equal, then we have a palindrome

if (n1 == rev)

printf("%ld is a palindrome\n",n1);

else

printf("%ld is not a palindrome\n",n1);

}