namespace std {
class ios_base::Init {
public:
Init();
~Init();
private:
static int init_cnt; };
}
The class Init describes an object whose construction ensures the construction of the eight objects declared in <iostream> ([iostream.objects]) that associate file stream buffers with the standard C streams provided for by the functions declared in <cstdio>.
For the sake of exposition, the maintained data is presented here as:
static int init_cnt, counts the number of constructor and destructor calls for class Init, initialized to zero.
Init();
Effects: Constructs an object of class Init. Constructs and initializes the objects cin, cout, cerr, clog, wcin, wcout, wcerr, and wclog if they have not already been constructed and initialized.
~Init();
Effects: Destroys an object of class Init. If there are no other instances of the class still in existence, calls cout.flush(), cerr.flush(), clog.flush(), wcout.flush(), wcerr.flush(), wclog.flush().
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