Due date: monday 3/7

  1. An input line contains a word consisting of lowercase letters only. Explain how a stack can be used to determine if the word is a palindrome.

  2. Implement Program P4.6 on a local C file, so that it compiles without warning with an up-to-date compiler like gcc or clang (not tcc).

  3. Modify Program P4.6 so that it works with any integer operands (as opposed with single-digit operands).