dmd/compiler/samples/wc.d

import std.stdio;
import std.file;

void main(string[] args)
{
    int w_total;
    int l_total;
    int c_total;

    writeln("   lines   words   bytes file");

    foreach (arg; args[1 .. $])
    {
        int w_cnt, l_cnt, c_cnt;
        bool inword;

        string input = readText(arg);

        foreach (char c; input)
        {
            if (c == '\n')
                ++l_cnt;

            if (c != ' ')
            {
                if (!inword)
                {
                    inword = true;
                    ++w_cnt;
                }
            }
            else
                inword = false;

            ++c_cnt;
        }

        writefln("%8s%8s%8s %s\n", l_cnt, w_cnt, c_cnt, arg);
        l_total += l_cnt;
        w_total += w_cnt;
        c_total += c_cnt;
    }

    if (args.length > 2)
    {
        writefln("--------------------------------------\n%8s%8s%8s total",
                 l_total, w_total, c_total);
    }
}