Projects, 01-06 completed

1 files changed, 31 insertions, 0 deletions

diff --git a/projects/12/SysTest/Main.jack b/projects/12/SysTest/Main.jack
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+// This file is part of www.nand2tetris.org

+// and the book "The Elements of Computing Systems"

+// by Nisan and Schocken, MIT Press.

+// File name: projects/12/SysTest/Main.jack

+

+/** Test program for the OS Sys class. */

+class Main {

+

+    /** Tests the wait method of the Sys class. */

+    function void main() {

+        var char key;

+

+        do Output.printString("Wait test:");

+        do Output.println();

+        do Output.printString("Press any key. After 2 seconds, another message will be printed:");

+

+        while (key = 0) {

+	        let key = Keyboard.keyPressed();

+        }

+        while (~(key = 0)) {

+            let key = Keyboard.keyPressed();

+        }

+        

+        do Sys.wait(2000);

+

+        do Output.println();

+        do Output.printString("Time is up. Make sure that 2 seconds elapsed.");

+        

+        return;

+    }

+}