Add the initial EN translation for C++ code (#1346)

en/codes/cpp/chapter_tree/binary_tree.cpp

@@ -0,0 +1,43 @@
+/**
+ * File: binary_tree.cpp
+ * Created Time: 2022-11-25
+ * Author: krahets (krahets@163.com)
+ */
+
+#include "../utils/common.hpp"
+
+/* Driver Code */
+int main() {
+    /* Initialize binary tree */
+    // Initialize node
+    TreeNode *n1 = new TreeNode(1);
+    TreeNode *n2 = new TreeNode(2);
+    TreeNode *n3 = new TreeNode(3);
+    TreeNode *n4 = new TreeNode(4);
+    TreeNode *n5 = new TreeNode(5);
+    // Construct node references (pointers)
+    n1->left = n2;
+    n1->right = n3;
+    n2->left = n4;
+    n2->right = n5;
+    cout << endl << "Initialize binary tree\n" << endl;
+    printTree(n1);
+
+    /* Insert and remove nodes */
+    TreeNode *P = new TreeNode(0);
+    // Insert node P between n1 -> n2
+    n1->left = P;
+    P->left = n2;
+    cout << endl << "After inserting node P\n" << endl;
+    printTree(n1);
+    // Remove node P
+    n1->left = n2;
+    delete P; // Free memory
+    cout << endl << "After removing node P\n" << endl;
+    printTree(n1);
+
+    // Free memory
+    freeMemoryTree(n1);
+
+    return 0;
+}