说明：  实现回文的识别程序bool checkpa(char arr[])或bool checkpa(char* cptr)，然后在main函数中读入“abcdd”,显示“it is not a palindrome”,读入“abcba”,显示“it is a palindrome”
(The palindrome recognizer bool checkpa (char arr []) or bool checkpa (char * cptr) reads "abcdd" in the main function, displays "it is not a palindrome", reads "abcba" and displays "it is a palindrome".)