support bazel complie this project and format code.

basic_content/const/class_const/first_example/main.cpp

@@ -1,32 +1,12 @@
-#include<iostream>
-#include"apple.cpp"
+#include "apple.h"
+#include <iostream>
 using namespace std;
 
-Apple::Apple(int i):apple_number(i)
-{
-
-}
-int Apple::add(int num){
-    take(num);
-}
-int Apple::add(int num) const{
-    take(num);
-}
-void Apple::take(int num) const
-{
-    cout<<"take func "<<num<<endl;
-}
-int Apple::getCount() const
-{
-    take(1);
-//    add(); //error
-    return apple_number;
-}
-int main(){
-    Apple a(2);
-    cout<<a.getCount()<<endl;
-    a.add(10);
-    const Apple b(3);
-    b.add(100);
-    return 0;
+int main() {
+  Apple a(2);
+  cout << a.getCount() << endl;
+  a.add(10);
+  const Apple b(3);
+  b.add(100);
+  return 0;
 }