What does using namespace std; do?

Question

What is the matter with this C++ code?

I get an error message saying: that there should be a ; before z, which is not correct. The only part t

Answer 1

using namespace std; means you can write cout later on rather than std::cout. It saves typing at the expense of gross namespace pollution.

Your compile error can be fixed by writing cout << z;

Also, do return a value from main.