support bazel complie this project and format code.

basic_content/sizeof/blackclass.cpp

@@ -6,14 +6,11 @@
  * @date 2019-07-21
  */
 
-#include<iostream>
-#include<bits/stdc++.h>
+#include <bits/stdc++.h>
+#include <iostream>
 using namespace std;
-#include<graphics.h> // use size in graphics also
-class A{};
-int main()
-{
-    cout<<sizeof(A)<<endl;
-    cout<<sizeof
-    return 0;
+class A {};
+int main() {
+  cout << sizeof(A) << endl;
+  return 0;
 }