>     The following works in plain old C:

> #include <stdio.h>
> #include <string.h>
> static void print_start(char const *name, char const *what)
> {
>      unsigned name_len, what_len, total;

>      name_len = strlen(name);
>      what_len = strlen(what);
>      total = name_len + what_len + 3;
>      {
>        char buf[total], *p=buf;
>        memcpy(p, name, name_len);
>        p += name_len;
>        *p++ = ' ';
>        memcpy(p, what, what_len);
>        p += what_len;
>        *p++ = ':';
>        *p = ' ';
>        *buf &= ~0x20;

>        Write(2, buf, total);
>      }
> }

>     Embedded subprograms have other use cases. In long programs,
> they allow to declare variables with a limited scope, just near
> where they are used.