c++ - Use or don't use 'this' within a object -

this question has answer here:

• excessive use of `this` in c++ [duplicate] 15 answers
• when should use “this” keyword in c++? [duplicate] 7 answers

my question refers case when want call other methods of same class. where's difference of doing , without use of 'this'? same variables of class. there difference accessing variables through 'this'? related whether methods / variables private / public? example:

class { private:     int i;     void print_i () { cout << << endl; }  public:     void do_something () {          this->print_i();    //call 'this', or ...         print_i();          //... call without 'this'          this->i = 5;        //same setting member;         = 5;     } }; 

generally, it's question of style. of places i've worked have preferred not using this->, except when necessary.

there cases makes difference:

int func();  template <typename base> class derived : public base {     int f1() const     {         return func();      //  calls global func, above.     }     int f2() const     {         return this->func();  //  calls member function of base     } }; 

in case, this-> makes name of function dependent, in turn defers binding when template instantiated. without this->, function name bound when template defined, without considering might in base (since isn't known when template defined).