added v2.0

07_Operating_System/Math.jack

@@ -0,0 +1,42 @@
+/**
+ * A library of commonly used mathematical functions.
+ * Note: Jack compilers implement multiplication and division using OS method calls.
+ */
+class Math {
+
+    /** Initializes the library. */
+    function void init() {
+    }
+
+    /** Returns the absolute value of x. */
+    function int abs(int x) {
+    }
+
+    /** Returns the product of x and y. 
+     *  When a Jack compiler detects the multiplication operator '*' in the 
+     *  program's code, it handles it by invoking this method. In other words,
+     *  the Jack expressions x*y and multiply(x,y) return the same value.
+     */
+    function int multiply(int x, int y) {
+    }
+
+    /** Returns the integer part of x/y.
+     *  When a Jack compiler detects the multiplication operator '/' in the 
+     *  program's code, it handles it by invoking this method. In other words,
+     *  the Jack expressions x/y and divide(x,y) return the same value.
+     */
+    function int divide(int x, int y) {
+    }
+
+    /** Returns the integer part of the square root of x. */
+    function int sqrt(int x) {
+    }
+
+    /** Returns the greater number. */
+    function int max(int a, int b) {
+    }
+
+    /** Returns the smaller number. */
+    function int min(int a, int b) {
+    }
+}