world wide c++ method is same or not??

Question

In my school days after the #include<iostream.h> we use #include<conio.h> for std input/output
but here we r using namespace ???? i dono y

Answer 1

i think #include<conio.h> will be used in c language.using namespace std is uséd in c++.but both are for takingstd i/p and o/p into program.

Answer 2

nobody dono abt thiz difference