idk why these stuffs get stashed for so long and I didn't ever commit them

Experiment/Experiment3/LeafNum.cpp

@@ -0,0 +1,53 @@
+#include <iostream>
+#include "BiTree.h"
+using namespace std;
+
+//递归方法求解二叉树叶节点个数
+template <class DT>
+int LeafNum_1(BTNode<DT>* bt) {
+	if (!bt) {
+		return 0;
+	}
+	else if (bt->lchild == NULL && bt->rchild == NULL) {
+		return 1;
+	}
+	else {
+		return LeafNum_1(bt->lchild) + LeafNum_1(bt->rchild);
+	}
+}
+
+//非递归方法求解二叉树叶节点个数
+template <class DT>
+int LeafNum_2(BTNode<DT>* bt) {
+	if (!bt)
+		return 0;
+	SqStack<DT> S;
+	InitStack(S, 20);
+	BTNode<DT>* p = bt;
+	int count = 0;
+	while (p != NULL || !StackEmpty(S))
+	{
+		while (p != NULL)
+		{
+			if (p->lchild == NULL && p->rchild == NULL)
+				count++;
+			Push(S, p);
+			p = p->lchild;
+		}
+		if (!StackEmpty(S))
+		{
+			Pop(S, p);
+			p = p->rchild;
+		}
+	}
+	return count;
+}
+
+int main() {
+	BTNode<char>* bt;
+	CreateBiTree(bt);
+	cout << "递归方法求得二叉树叶节点个数为：" << LeafNum_1(bt) << endl;
+	cout << "非递归方法求得二叉树叶节点个数为：" << LeafNum_2(bt) << endl;
+	DestroyBiTree(bt);
+	return 0;
+}