Calculate PI using my own programming language: Stout

calculate_pi.stout

/*
Calculate PI using my own programming language: Stout

author = Andrea Fioraldi
copyright = Copyright 2017, Andrea Fioraldi
license = MIT
mail = andreafioraldi@gmail.com
*/

use IO;
use Math;

if(args.Length() < 3) {
    IO.PrintErr("Usage: ./calculate_pi.dubbel <precision:int> <output_file:string>\n");
    return 1;
}

try precision <- args[1].ToInt();
catch {
    IO.PrintErr("The precision argument must be an integer\n");
    return 1;
}

output <- args[2];

pi <- Math.GetPI(precision);

try file <- new IO.File(output, "w");
catch {
    IO.PrintErr("Invalid file ", output, "\n");
    return 1;
}

file.Write(pi);
file.Close();

IO.Printl("Done.");