C++

Question

i cant declare cout wihout usingname space

Answer 1

Then use it...

Answer 2

It is not clear what you mean, but...
You may use cout without "using namespace std". In such case you have to use:
std::cout
Alternatively you may declare:
using std::cout;
And later just use cout.

Answer 3

namespace is standard library of c++ that defines cout operator and many others so must I use it