File I/O in D programming language

Question

I'm trying to follow a simple tutorial and can't get the following code to work:

void main(string args[])
{
  auto f = File("test.txt", "w");
  f.writeln("Hello, Worlds!");
}

I'm using the dmd compiler on windows.

Answer 1

If you are using D2, you need to import std.stdio;:

import std.stdio;
void main(string args[])
{
  auto f = File("test.txt", "w");
  f.writeln("Hello, Worlds!");
}

If you are using D1, the File class is in std.stream, and the API is slightly different:

import std.stream;
void main() {
  auto f = new File("test.txt", FileMode.Out);
  f.writeLine("Hello, Worlds!");
}