update zig codes for Section 'Heap' (heap.zig)

codes/zig/chapter_heap/heap.zig

@@ -14,17 +14,16 @@ fn greaterThan(context: void, a: i32, b: i32) std.math.Order {
     return lessThan(context, a, b).invert();
 }
 
-fn testPush(comptime T: type, mem_allocator: std.mem.Allocator, heap_push: anytype, val: T) !void {
+fn testPush(comptime T: type, mem_allocator: std.mem.Allocator, heap: anytype, val: T) !void {
-    var heap = heap_push;
     try heap.add(val);  //元素入堆
     std.debug.print("\n元素 {} 入堆后\n", .{val});
     try inc.PrintUtil.printHeap(T, mem_allocator, heap);
 }
 
-fn testPop(comptime T: type, mem_allocator: std.mem.Allocator, heap_pop: anytype) !void {
+fn testPop(comptime T: type, mem_allocator: std.mem.Allocator, heap: anytype) !void {
-    var val = heap_pop.remove();    //堆顶元素出堆
+    var val = heap.remove();    //堆顶元素出堆
     std.debug.print("\n堆顶元素 {} 出堆后\n", .{val});
-    try inc.PrintUtil.printHeap(T, mem_allocator, heap_pop);
+    try inc.PrintUtil.printHeap(T, mem_allocator, heap);
 }
 
 // Driver Code

codes/zig/include/PrintUtil.zig

@@ -65,7 +65,7 @@ pub fn printHeap(comptime T: type, mem_allocator: std.mem.Allocator, queue: anyt
     std.debug.print("堆的数组表示：", .{});
     printArray(T, arr[0..len]);
     std.debug.print("\n堆的树状表示：\n", .{});
-    var root =  try TreeUtil.arrQueToTree(T, mem_allocator, arr[0..len]);    // through TailQueue
+    var root =  try TreeUtil.arrToTree(T, mem_allocator, arr[0..len]);    // through TailQueue
     try printTree(root, null, false);
 }
 

codes/zig/include/TreeNode.zig

@@ -23,8 +23,8 @@ pub fn TreeNode(comptime T: type) type {
     };   
 }
 
-// Generate a binary tree with an array (through TailQueue)
+// Generate a binary tree with an array
-pub fn arrQueToTree(comptime T: type, mem_allocator: std.mem.Allocator, arr: []T) !?*TreeNode(T) {
+pub fn arrToTree(comptime T: type, mem_allocator: std.mem.Allocator, arr: []T) !?*TreeNode(T) {
     if (arr.len == 0) return null;
     var root = try mem_allocator.create(TreeNode(T));
     root.init(arr[0]);