Editing Literate programming (section)

=== Order of human logic, not that of the compiler ===
In a noweb literate program besides the free order of their exposition, the chunks behind macros, once introduced with <code>&lt;&lt;...&gt;&gt;=</code>, can be grown later in any place in the file by simply writing <code>&lt;&lt;name of the chunk&gt;&gt;=</code> and adding more content to it, as the following snippet illustrates (<code>+</code> is added by the document formatter for readability, and is not in the code).<ref name="noweb-wc" />

{{pre|1=
The grand totals must be initialized to zero at the beginning of the program.
If we made these variables local to main, we would have to do this  initialization
explicitly; however, C globals are automatically zeroed. (Or rather,``statically
zeroed.'&NoBreak;' (Get it?)

    &lt;&lt;Global variables&gt;&gt;+=
    {{codett|2=c|long tot_word_count, tot_line_count,}}
         tot_char_count;
      {{codett|2=c|/* total number of words, lines, chars */}}
    @
}}