what is the difference between
std::cout<<"dfdfd"<<endl;//everywhere
and
using namespace std::cin
putting above line at the top of the main function
and putting the below line at the top of the main
using namespace std;
and + 2 bonus questions.
1.Are there any other namespaces than 'std' in c++?
2. Are cin and cout the only ones in the namesapce 'std'?
try to answer all if you can.thanks