tasks a-s

Task/Guess-the-number-With-feedback--player-/JavaScript/guess-the-number-with-feedback--player-.js

@@ -0,0 +1,53 @@
+#!/usr/bin/env js
+
+var DONE = RIGHT = 0, HIGH = 1, LOW = -1;
+
+function main() {
+    showInstructions();
+    while (guess(1, 100) !== DONE);
+}
+
+function guess(low, high) {
+    if (low > high) {
+        print("I can't guess it. Perhaps you changed your number.");
+        return DONE;
+    }
+
+    var g = Math.floor((low + high) / 2);
+    var result = getResult(g);
+    switch (result) {
+        case RIGHT:
+            return DONE;
+        case LOW:
+            return guess(g + 1, high);
+        case HIGH:
+            return guess(low, g - 1);
+    }
+}
+
+function getResult(g) {
+    while(true) {
+        putstr('Is it ' + g + '? ');
+        var ans = readline().toUpperCase().replace(/^\s+/, '') + ' ';
+        switch (ans[0]) {
+            case 'R':
+                print('I got it! Thanks for the game.');
+                return RIGHT;
+            case 'L':
+                return LOW;
+            case 'H':
+                return HIGH;
+            default:
+                print('Please tell me if I am "high", "low" or "right".');
+        }
+    }
+}
+
+function showInstructions() {
+    print('Think of a number between 1 and 100 and I will try to guess it.');
+    print('After I guess, type "low", "high" or "right", and then press enter.');
+    putstr("When you've thought of a number press enter.");
+    readline();
+}
+
+main();