Exercise: word count

Implement the default behavior of the wc command of Linux/Unix. For each file showing

• number of lines
• number of words
• number of bytes

$ wc intro.md files.md strings.md
  182   519  5658 intro.md
  162   273  3133 files.md
  345   943  9708 strings.md
  689  1735 18499 total