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# Examples
## `cloc`
This program reads C source code from `stdin` and outputs it to `stdout`
with comments and empty lines removed. It's useful for counting lines of code.
## `count_hash`
This program reads text from `stdin`, counts occurrences of identical words
separated by whitespace, and prints the result to `stdout`.
## `pcre2grep`
A grep-like program using Perl-compatible regular expressions. Start the
program with the `-help` argument to see its functionality.
## `subst`
Substitutes text in files using Perl-compatible regular expressions and
substitution patterns. Start the program with the `-help` argument to see
its functionality.
Example invocation:
```sh
subst '([Tt])ermcap' '$1ermCap' < /etc/termcap
```
## `dfa_restart`
Tests the DFA matching function and its partial match restart capability.
Given a pattern, it accepts input incrementally, restarting the prior
partial match until the pattern either succeeds or fails.
Example interaction:
```sh
$ dfa_restart.exe 'abc12+3'
> abc
partial match, provide more input:
> 122222
partial match, provide more input:
> 222
partial match, provide more input:
> 3
match completed: "[|0;1;0|]"
```
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