diff --git a/73 Reverse/javascript/reverse.html b/73 Reverse/javascript/reverse.html new file mode 100644 index 00000000..3abddb0e --- /dev/null +++ b/73 Reverse/javascript/reverse.html @@ -0,0 +1,9 @@ + + +REVERSE + + +

+
+
+
diff --git a/73 Reverse/javascript/reverse.js b/73 Reverse/javascript/reverse.js
new file mode 100644
index 00000000..44937b51
--- /dev/null
+++ b/73 Reverse/javascript/reverse.js	
@@ -0,0 +1,159 @@
+// REVERSE
+//
+// Converted from BASIC to Javascript by Oscar Toledo G. (nanochess)
+//
+
+function print(str)
+{
+    document.getElementById("output").appendChild(document.createTextNode(str));
+}
+
+function input()
+{
+    var input_element;
+    var input_str;
+    
+    return new Promise(function (resolve) {
+                       input_element = document.createElement("INPUT");
+                       
+                       print("? ");
+                       input_element.setAttribute("type", "text");
+                       input_element.setAttribute("length", "50");
+                       document.getElementById("output").appendChild(input_element);
+                       input_element.focus();
+                       input_str = undefined;
+                       input_element.addEventListener("keydown", function (event) {
+                                                      if (event.keyCode == 13) {
+                                                      input_str = input_element.value;
+                                                      document.getElementById("output").removeChild(input_element);
+                                                      print(input_str);
+                                                      print("\n");
+                                                      resolve(input_str);
+                                                      }
+                                                      });
+                       });
+}
+
+function tab(space)
+{
+    var str = "";
+    while (space-- > 0)
+        str += " ";
+    return str;
+}
+
+var a = [];
+var n;
+
+// Subroutine to print the rules
+function print_rules()
+{
+    print("\n");
+    print("THIS IS THE GAME OF 'REVERSE'.  TO WIN, ALL YOU HAVE\n");
+    print("TO DO IS ARRANGE A LIST OF NUMBERS (1 THROUGH " + n + ")\n");
+    print("IN NUMERICAL ORDER FROM LEFT TO RIGHT.  TO MOVE, YOU\n");
+    print("TELL ME HOW MANY NUMBERS (COUNTING FROM THE LEFT) TO\n");
+    print("REVERSE.  FOR EXAMPLE, IF THE CURRENT LIST IS:\n");
+    print("\n");
+    print("2 3 4 5 1 6 7 8 9\n");
+    print("\n");
+    print("AND YOU REVERSE 4, THE RESULT WILL BE:\n");
+    print("\n");
+    print("5 4 3 2 1 6 7 8 9\n");
+    print("\n");
+    print("NOW IF YOU REVERSE 5, YOU WIN!\n");
+    print("\n");
+    print("1 2 3 4 5 6 7 8 9\n");
+    print("\n");
+    print("NO DOUBT YOU WILL LIKE THIS GAME, BUT\n");
+    print("IF YOU WANT TO QUIT, REVERSE 0 (ZERO).\n");
+    print("\n");
+}
+
+// Subroutine to print list
+function print_list()
+{
+    print("\n");
+    for (k = 1; k <= n; k++)
+        print(" " + a[k] + " ");
+    print("\n");
+    print("\n");
+}
+
+// Main program
+async function main()
+{
+    print(tab(32) + "REVERSE\n");
+    print(tab(15) + "CREATIVE COMPUTING  MORRISTOWN, NEW JERSEY\n");
+    print("\n");
+    print("\n");
+    print("\n");
+    print("REVERSE -- A GAME OF SKILL\n");
+    print("\n");
+    for (i = 0; i <= 20; i++)
+        a[i] = 0;
+    // *** N=NUMBER OF NUMBER
+    n = 9;
+    print("DO YOU WANT THE RULES");
+    str = await input();
+    if (str != "NO")
+        print_rules();
+    while (1) {
+        // *** Make a random list a(1) to a(n)
+        a[1] = Math.floor((n - 1) * Math.random() + 2);
+        for (k = 2; k <= n; k++) {
+            do {
+                a[k] = Math.floor(n * Math.random() + 1);
+                for (j = 1; j <= k - 1; j++) {
+                    if (a[k] == a[j])
+                        break;
+                }
+            } while (j <= k - 1) ;
+        }
+        // *** Print original list and start game
+        print("\n");
+        print("HERE WE GO ... THE LIST IS:\n");
+        t = 0;
+        print_list();
+        while (1) {
+            while (1) {
+                print("HOW MANY SHALL I REVERSE");
+                r = parseInt(await input());
+                if (r == 0)
+                    break;
+                if (r <= n)
+                    break;
+                print("OOPS! TOO MANY! I CAN REVERSE AT MOST " + n + "\n");
+            }
+            if (r == 0)
+                break;
+            t++;
+            // *** Reverse r numbers and print new list
+            for (k = 1; k <= Math.floor(r / 2); k++) {
+                z = a[k];
+                a[k] = a[r - k + 1];
+                a[r - k + 1] = z;
+            }
+            print_list();
+            // *** Check for a win
+            for (k = 1; k <= n; k++) {
+                if (a[k] != k)
+                    break;
+            }
+            if (k > n) {
+                print("YOU WON IT IN " + t + " MOVES!!!\n");
+                print("\n");
+                break;
+            }
+        }
+        print("\n");
+        print("TRY AGAIN (YES OR NO)");
+        str = await input();
+        if (str != "YES")
+            break;
+    }
+    print("\n");
+    print("O.K. HOPE YOU HAD FUN!!\n");
+}
+
+main();