support bazel complie this project and format code.

basic_content/abstract/interesting_facts2.cpp

@@ -6,33 +6,28 @@
  * @date 2019-07-20
  */
 
-#include<iostream> 
-using namespace std; 
-
+#include <iostream>
+using namespace std;
 
 /**
  * @brief 抽象类至少包含一个纯虚函数
  */
-class Base
-{ 
-    int x; 
-public: 
-    virtual void show() = 0; 
-    int getX() { return x; } 
-    
-}; 
-class Derived: public Base 
-{ 
-public: 
-    void show() { cout << "In Derived \n"; } 
-    Derived(){}
-}; 
-int main(void) 
-{ 
-    //Base b;  //error! 不能创建抽象类的对象
-    //Base *b = new Base(); error!
-    Base *bp = new Derived(); // 抽象类的指针和引用 -> 由抽象类派生出来的类的对象
-    bp->show();
-    return 0; 
-} 
+class Base {
+  int x;
 
+public:
+  virtual void show() = 0;
+  int getX() { return x; }
+};
+class Derived : public Base {
+public:
+  void show() { cout << "In Derived \n"; }
+  Derived() {}
+};
+int main(void) {
+  // Base b;  //error! 不能创建抽象类的对象
+  // Base *b = new Base(); error!
+  Base *bp = new Derived(); // 抽象类的指针和引用 -> 由抽象类派生出来的类的对象
+  bp->show();
+  return 0;
+}