1.You will not be able to refer to the previous declaration from inside the local scope.
您将无法从局部范围内引用以前的声明。
2.This warning indicates that a declaration has the same name as a declaration at an outer scope and hides the previous declaration.
此警告意味着某个声明与外部范围中的声明同名并隐藏了以前的声明。
3.If you do not use the suffix in the previous declaration, you will get a compilation error because you are attempting to store a
如果在以上声明中不使用后缀，则会因为您试图将一个
4.Declaration of differs from previous declaration
的说明与先前的说明不同
5.In the previous declaration, the full name of class
在前面的声明中，类