In C++, how to print ASCII art to the console?

Adjacent string literals are concatenated, so you can do this:

cout << " _______________________ _______ _          _______         _______ _______  _______ _       _______         \n"
        "(  ____ \__   __/  ___  )  ____ \ \    /\  (  ___  )\     /|  ____ \  ____ )(  ____ \ \     (  ___  )\     /|\n"
        "| (    \/  ) (  | (   ) | (    \/  \  / /  | (   ) | )   ( | (    \/ (    )|| (    \/ (     | (   ) | )   ( |\n"
        "| (_____   | |  | (___) | |     |  (_/ /   | |   | | |   | | (__   | (____)|| (__   | |     | |   | | | _ | |\n"
        "(_____  )  | |  |  ___  | |     |   _ (    | |   | | (   ) )  __)  |     __)|  __)  | |     | |   | | |( )| |\n"
        "      ) |  | |  | (   ) | |     |  ( \ \   | |   | |\ \_/ /| (     | (\ (   | (     | |     | |   | | || || |\n"
        "/\____) |  | |  | )   ( | (____/\  /  \ \  | (___) | \   / | (____/\ ) \ \__| )     | (____/\ (___) | () () |\n"
        "\_______)  )_(  |/     \|_______/_/    \/  (_______)  \_/  (_______//   \__/|/      (_______/_______)_______)\n";

Or, more accurately, perhaps:

cout << "                              .::/-                                                                                                                                                             \n"
        "                              .+++/                                                                                                                                                             \n"
        "                   `.::`       /+++.                                                                                                                                                            \n"
        "                  -////.      :+++-                                                                                                                                                             \n"
        "                    .////-`    .+++/