Const int & ri = i; // ok, reference is not distinguished
Ri ; // error, Ri is constant, not variable
i ; // ok, = = nothing to do with the reference
Ri = b; // error, ri is constant
i = j; // ok, = The variable on the right is independent of the reference
INT & const ri = i; // error, there is no such form, no meaning
He asked me why ri will compile errors, and i will not .ri, I don't all point to the same memory area?
In fact, we can use this variable in IDE, and the compiler is used as a tag or an index. They do not directly represent a memory unit, which is used as an operator. Keyword Const Prefix Description This variable is only read only by the memory cell assigned to it, not that its memory space operating system is not allowed. You can use const_cast <
TYPE-ID> This operator modifies the access permission of the const variable, and the memory space is writable for you!
