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-//
-// When Andrew Kelley announced the idea of a new programming language
-// - namely Zig - in his blog on February 8, 2016, he also immediately
-// stated his ambitious goal: to replace the C language!
-//
-// In order to be able to achieve this goal at all, Zig should be
-// as compatible as possible with its "predecessor".
-// Only if it is possible to exchange individual modules in existing
-// C programs without having to use complicated wrappers,
-// the undertaking has a chance of success.
-//
-// So it is not surprising that calling C functions and vice versa
-// is extremely "smooth".
-//
-// To call C functions in Zig, you only need to specify the library
-// that contains said function. For this purpose there is a built-in
-// function corresponding to the well-known @import():
-//
-//                           @cImport()
-//
-// All required libraries can now be included in the usual Zig notation:
-//
-//                    const c = @cImport({
-//                        @cInclude("stdio.h");
-//                        @cInclude("...");
-//                    });
-//
-// Now a function can be called via the (in this example) constant 'c':
-//
-//                    c.puts("Hello world!");
-//
-// By the way, most C functions have return values in the form of an
-// integer value. Errors can then be evaluated (return < 0) or other
-// information can be obtained. For example, 'puts' returns the number
-// of characters output.
-//
-// So that all this does not remain a dry theory now, let's just start
-// and call a C function out of Zig.
-
-// our well-known "import" for Zig
-const std = @import("std");
-
-// and here the new import for C
-const c = @cImport({
-    @cInclude("unistd.h");
-});
-
-pub fn main() void {
-
-    // In order to output text that can be evaluated by the
-    // Zig Builder, we need to write it to the Error output.
-    // In Zig, we do this with "std.debug.print" and in C we can
-    // specify a file descriptor i.e. 2 for error console.
-    //
-    // In this exercise we use 'write' to output 17 chars,
-    // but something is still missing...
-    const c_res = write(2, "Hello C from Zig!", 17);
-
-    // let's see what the result from C is:
-    std.debug.print(" - C result is {d} chars written.\n", .{c_res});
-}
-//
-// Something must be considered when compiling with C functions.
-// Namely that the Zig compiler knows that it should include
-// corresponding libraries. For this purpose we call the compiler
-// with the parameter "lc" for such a program,
-// e.g. "zig run -lc hello_c.zig".
-//