Update README

Author: MoritzGoeckel

README.md

@@ -25,7 +25,7 @@ You can download the executables for Windows and Linux in the [release section](
 - [x] Structs (on the heap)
 - [x] C-calls (FFI) to dynamic libraries
 - [x] Strings
-- [ ] Printing
+- [x] Printing
 - [ ] Arrays
 - [ ] Closures
 
@@ -113,11 +113,40 @@ ret l.begin.x + l.end.y;
 
 ```
 # Strings
-let print = extern test::print(s: Str): Void;
+let print = extern test::print(s: String): Void;
 let str = "Hello, World!";
 print(str);
 ```
 
+```
+# Using external library (raylib)
+let str = "Hello, World!";
+
+let InitWindow = extern raylib::InitWindow(w: Int, h: Int, s: String): Void;
+InitWindow(800, 600, str);
+
+let SetTargetFPS = extern raylib::SetTargetFPS(fps: Int): Void;
+SetTargetFPS(60);
+
+let WindowShouldClose = extern raylib::WindowShouldClose(): Bool;
+let CloseWindow = extern raylib::CloseWindow(): Void;
+
+let BeginDrawing = extern raylib::BeginDrawing(): Void;
+let ClearBackground = extern raylib::ClearBackground(color: Int): Void;
+let EndDrawing = extern raylib::EndDrawing(): Void;
+
+let DrawText = extern raylib::DrawText(text: String, x: Int, y: Int, fontSize: Int, color: Int): Void;
+
+while(WindowShouldClose() == false) {
+    BeginDrawing();
+    ClearBackground(1);
+    DrawText(str, 190, 200, 20, 1);
+    EndDrawing();
+}
+
+CloseWindow();
+```
+
 ## Error reporting
 
 Following you find an example on how parsing errors are reported to the user

TODO.md

@@ -1,6 +1,5 @@
 # Roadmap
 
-- Strings
 - terminal IO
 - file IO
 - Floats
@@ -9,6 +8,7 @@
   synatx sugar for get, set with []
   (for arrays, strings, maps)
 - Arrays
+- Dynamic Strings
 - Garbage collection for heap objects (structs)
 - Fix recursion example. Get return type of non recursive
   return and use as override. Ignore recursive return.

mfiles/raylib.m

@@ -1,4 +1,3 @@
-
 let str = "Hello, World!";
 
 let InitWindow = extern raylib::InitWindow(w: Int, h: Int, s: String): Void;