写了个tostring

homework4/test1.cpp

@@ -1,14 +1,13 @@
 /*
- *二叉树采用二叉链存储结构存放，结点值为int 类型，设计一个递归算法求二叉树 bt 中所有叶子结点值之和
+ *二叉树采用二叉链存储结构存放，结点值为int 类型，设计一个递归算法求二叉树 bt 中所有叶子结点值之和
  */
 #include<iostream>
 #include"BiTree.h"
 using namespace std;
 
 
-
-BiTree* createTreeFromArray(const int* values, int size) {
-    BiTree* root = nullptr;
+BiTree *createTreeFromArray(const int *values, int size) {
+    BiTree *root = nullptr;
     for (int i = 0; i < size; ++i) {
         BiTree::insertNode(root, values[i]);
     }
@@ -19,8 +18,9 @@ int main() {
     int testValues[] = {7, 3, 10, 1, 5, 9, 12};
     int size = sizeof(testValues) / sizeof(testValues[0]);
 
-    BiTree* root = createTreeFromArray(testValues, size);
+    BiTree *root = createTreeFromArray(testValues, size);
 
-    cout << "Sum of leaf nodes: " << BiTree::sum_leaf(root) << endl;
+    cout << "树结构为：" << endl << root->toString() << endl;
+    cout << "叶子节点之和为: " << BiTree::sum_leaf(root) << endl;
     return 0;
-}
+}