Why in C++ passing a pointer is not termed as a parameter passing technique.....Is it because it has a flaw of some kind i.e. address is not reflected back/we can change the address in called function..is that so...if that's the reason....then we can pass it as const pointer as a remedy.....

Actually i am not sure that...changing address is flaw...

plz comment

it is. passing a pointer is no different to passing anything else. Its a parameter the same as any other.

It is indeed a parameter passing technique -- there are only two ways to pass something, by value and by reference. Pass by reference can be done in one of two ways -- a pointer (C) or reference operator (C++). The three differences I can think of
1. use of dot or pointer operators within the receiving function
2. use of '&' operator inside the passing function
3. They can be overloaded functions as shown in the examples above.

Otherwise, the dot and pointer operator compile down to the same identical code. Its all really just a matter of programmer preference.