c++ - Error: Initial value of reference to non-const must be an lvalue -


getting error string class. intellisense not let me use strcmp compare object self-invoking object (i.e. *this).

i tried making own operator conversion function this, still giving me error.

what have change in code make work??

//overloaded comparison operators bool &string::operator<(const string & obj) {     return strcmp(*this, obj) < 0 ? true : false; }  //operator conversion function string::operator char const * () const {     return mstr; }

you returning reference local variable. return value. can simplify return expression, , make method const, since comparing 2 objects should not change either of them:

bool string::operator<(const string & obj) const {   return strcmp(*this, obj) < 0; }

although not sure strcmp can deal 2 strings, passing it. judgning previous question, need

return strcmp(mstr, obj.mstr) < 0;


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