Question

A palindrome is a word or a phrase that is the same when read both forward and backward. Examples are: "bob," "sees," or "never odd or even" (ignoring spaces). Write a program whose input is a word or phrase, and that outputs whether the input is a palindrome.

Answer 1

Answer:

c++ program to check palindrome.

#include <bits/stdc++.h>

using namespace std;

int main() {

   string pal;

   bool b=1;

   getline(cin,pal);//taking input of a word or a line.

   int s=0,e=pal.length()-1;

   while(s<e)//loop to check palindrome.

   {

       if(pal[s]!=pal[e])

       {

           b=0;

           break;

       }

       s++;

       e--;

   }

   if(b)

       {

           cout<<"Text is palindrome"<<endl;//printing the message.

       }

       else

       {

           cout<<"Text is not palindrome"<<endl;//printing the message.

       }

return 0;

}

Output:-

geeks skeeg

Text is palindrome

geeks skeegs

Text is not palindrome

Explanation:

I have taken a string pal for the input of word or a text then I have taken two pointers one for starting and one for the end.In the loop i am keep checking the first and last characters of the string if they are same then continue otherwise break out of the loop and print not palindrome.