Pallindrome using vectors

Question

How can I make this code work. I am getting error of no matching function call
https://code.sololearn.com/c70U50f9ER3w/?ref=app

Answer 1

You can use reverse_iterator to copy contents of one std::vector to another.

After copying, you can use a loop to compare items from both <A> and <B> (at i-th index) for equality. If any difference were found, return false. If the loop ends with no difference found, return true.

https://code.sololearn.com/cPVKo32X4V71/?ref=app

Answer 2

Ipang can you explain the for loop you used to compare the 2 vectors

Answer 3

Here, <from> and <to> are variables representing indices, and we use these indices to compare contents of <A> and <B>, at the same index, one by one.

Having contents of <A> copied into <B> in reversed order; we have

0 1 2 3 4 <- index
A {1, 2, 3, 2, 1} <- values
B {1, 2, 3, 2, 1}

So we go checking whether element of <A> at index <from> equals to element of <B> (at the same index).

At any time during the check (in loop iteration), we return false in case we see element of <A> at index <from> being different from element of <B> at index <from>.

But IF the loop finished with no difference noticed, we return true, meaning the vector contains palindromic items.

Answer 4

Ipang Superb explanation, thank you Sir🙂

Answer 5

Glad if it helps 👌

Answer 6

In line 8, it should be template<typename T> bool pallindrome(std::vector<T>&A);

Answer 7

Okay I corrected that..but im getting error of undefined reference to bool pallindrome

Answer 8

What is the Modern application of C++.