Practical use of extra braces in C

Question

I know {} are used to separate entities such as functions, classes and conditional branching, but what other use would they have here?

#import &         


        

Answer 1

Extra braces gives you scope as Als mentioned. This can be used in case of Smart Pointers effectively. e.g., consider the following code in C++ (MSVC compiler)

int i = 0;
i++;
//More code follows 
...

{
    CComBSTR bstr("Hello");
    //use this bstr in some code
    .....
}

After the end braces, bstr won't be available. Furthermore, since it has gone out of scope, therefore, the destructor will also get called automatically.