Output in the screen in console mode

[Guest_imported]

How can I get what's printed in the screen, for example
....
printf("Hello"
....
how get what's in the screen ???

 

[Magical]

// it.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"

int main(int argc, char* argv[])
{
printf("Hello World!\n"
return 0;
}