c++ - Wrong answer calls on palindrome -

i coded palindrome program. think code right is_palindrome procedure. don't know why answers wrong.

because when input 2 1 1, return must palindrome. answers other.

#include <iostream> using namespace std;  bool is_palindrome(int input[], int numofslots);  int main(void) {     int n;     cin >> n;     int *input = new int[n]; // dynamic array n slots     (int = 0; < n; i++) {         cin >> input[i];     }      if (is_palindrome(input, n) == true) {         cout << "this palindrome.";     }     else {         cout << "this not palindrome.";     }     return 0; }  bool is_palindrome(int input[], int numofslots) {     int = 0;     while (i < numofslots/2)     {         if (input[i] != input[numofslots-i])             return false;         i++;     }     return true; } 

you going 1 past end of array in if (input[i] != input[numofslots-i]). when i == 0 input[numofslots-i] becomes input[numofslots] in case input[2]. since last valid index of input 1 comparing against garbage. should have

if (input[i] != input[numofslots-i - 1])