Question

The directive required in any c++ program that uses either cin or cout is

Answer 1

Explanation:

cin, cout, cerr, and clog are streams that handle standard inputs and standard outputs.

These are stream objects defined in iostream header file. std::cin is an object of class istream that represents the standard input stream oriented to narrow characters (of type char).

Answer 2

Explanation:

cin>>x;

cout<<x;

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