Consider the Iostream Library,in Particular,cout and Endl

Question

Examlex · Accepted Answer

The Answer is a)Place a using directive in you code,either globally or in the block where you will use it.Example:
using namespace std;
cout << "Hello World" << endl;
b)Place a using definition,in you code,either globally or in the block where you will use it.Example:
using std::cout;using std:endl;
cout << "Hello World" << endl;
c)Qualify each name you will use with the namespace name and the scope resolution operator.Example:
std::cout << "Hello World" << std::endl;

Consider the Iostream Library,in Particular,cout and Endl

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