const_cast problem and Dev Cpp 4.9.7.0

[Nobody/Anonymous]

Hello, I wrote a class that use a copy constructor with a const reference to my class...

There is a fragment of my code...

class r_ruota {
        friend ostream& operator << (ostream&, const r_ruota&);
        public:
        r_ruota(const r_ruota& r) {
                // costruttore copia
                vector<estratto>::iterator it;
                no_ruota=r.no_ruota;
                for (it=const_cast<vector<estratto>::iterator>(r.xresult.begin());
                        it!=const_cast<vector<estratto>::iterator>(r.xresult.end());
                        it++) {
                                xresult.push_back(*it);
                }
        }
        r_ruota() : no_ruota(0) { };
        r_ruota(int num) : no_ruota(num) { };
        int no_ruota;
        vector<estratto> xresult;
};

I got problems with const_cast and Dev-Cpp 4.9.7.0.
Dev-C++ 4 compile the source code, also Borland C++ compile it...
Can anyone help me?

[Nobody/Anonymous]

Why const_cast??

r isn't changed, is it?

try without const_cast

[Nobody/Anonymous]

Hello, thank for your answer.
The use of const_cast is suggested by Bruce Eckel in Thinking C++ vol. 1 at the chapter 3 (The C in C++).
He said that a const pointer to an object can't be assigned to a nonconst pointer.

I made your changes and the compiler does, but other compilers (Borland) requires const_cast...

Thank you.