add zig codes for Section Queue and Deque (#291)

* add zig codes for Section 'Queue'

* update zig codes for Section 'Queue'

* update zig codes for Section 'Queue'

* update zig codes for Section 'Queue'

* update zig codes for Section 'Queue' and 'Deque'

* update zig codes for Section 'Queue' and 'Deque'

* update zig codes for Section 'Queue' and 'Deque'

codes/zig/include/PrintUtil.zig

@@ -48,6 +48,18 @@ pub fn printLinkedList(comptime T: type, node: ?*ListNode(T)) !void {
     }
 }
 
+// Print a queue or deque
+pub fn printQueue(comptime T: type, queue: std.TailQueue(T)) void {
+    var node = queue.first;
+    std.debug.print("[", .{});
+    var i: i32 = 0;
+    while (node != null) : (i += 1) {
+        var data = node.?.data;
+        std.debug.print("{}{s}", .{data, if (i == queue.len - 1) "]" else ", " });
+        node = node.?.next;
+    }
+}
+
 // Print a HashMap
 pub fn printHashMap(comptime TKey: type, comptime TValue: type, map: std.AutoHashMap(TKey, TValue)) void {
     var it = map.iterator();