I am trying to display suit characters on a Windows console, but so far nothing I tried has worked.

#include<iostream> 
using namespace std;

int main() {
    //define the unicode for four suits, for display purpose
    const char SPADE[] = "\x03";
    const char CLUB[] = "\x04";
    const char HEART[] = "\x05";
    const char DIAMOND[] = "\x06";
    cout << SPADE;
}

But it outputs nothing. Then I tried:

// the following works for the Unix system, including Mac OS
const char SPADE[] = "\u2660";
const char CLUB[] = "\u2663";
const char HEART[] = "\u2665";
const char DIAMOND[] = "\u2666";
cout << SPADE;

and it output "?". I even tried simply:

cout << "♠" <<;

and it still output "?".