support bazel complie this project and format code.

practical_exercises/10_day_practice/day5/virtual/init.cpp

@@ -0,0 +1,39 @@
+/* 派生类初始化.cpp */
+#include <iostream>
+using namespace std;
+class A {
+  int a;
+
+public:
+  A(int x) {
+    a = x;
+    cout << "Virtual Bass A..." << endl;
+  }
+};
+class B : virtual public A {
+public:
+  B(int i) : A(i) { cout << "Virtual Bass B..." << endl; }
+};
+class C : virtual public A {
+  int x;
+
+public:
+  C(int i) : A(i) {
+    cout << "Constructing C..." << endl;
+    x = i;
+  }
+};
+class ABC : public C, public B {
+public:
+  //虚基类由最终派生类初始化
+  ABC(int i, int j, int k)
+      : C(i), B(j), A(i) // L1，这里必须对A进行初始化
+  {
+    cout << "Constructing ABC..." << endl;
+  }
+};
+int main() {
+  ABC obj(1, 2, 3);
+  
+  return 0;
+}