Maintain It with Zig(kristoff.it)

    char* c_foo(char* bar) { ... }

    fn rust_foo<'a>(bar: &'a str) -> &'a str { ... }

  // Count line length of stdin
  void main() {
      import std.range, std.stdio;

      auto sum = 0.0;
      auto count = stdin.byLine.tee!(l => sum += l.length).walkLength;

      writeln("Average line length: ", count ? sum / count : 0);
  }

  ----

  import std.algorithm, std.conv, std.functional, std.math, std.regex, std.stdio;

  alias round = pipe!(to!(real), std.math.round, to!(string));
  static reFloatingPoint = ctRegex!(`[0-9]+\.[0-9]+`);

  // Replace anything that looks like a real number with the rounded equivalent.
  void main(){
      stdin
          .byLine
          .map!(l => l.replaceAll!(c => c.hit.round)
                                  (reFloatingPoint))
          .each!(it => writeln(it));
  }