card-display.cpp

#include <iostream>
using namespace std;
void blankCard(char team, char sign){
//void blankCard(){
    cout
        <<(char)218
        <<(char)196
        <<(char)196
        <<(char)191
        <<"\n"
        <<(char)179
        <<team
        <<sign
        <<(char)179
        <<"\n"
        <<(char)192
        <<(char)196
        <<(char)196
        <<(char)217
        <<"\n";
}
char hearts=(char)3;
char spades=(char)6;
char diamonds=(char)4;
char clubs=(char)5;
int main()
{
    blankCard(hearts, 'K');
    blankCard(spades, 'A');
    blankCard(diamonds, '9');
    blankCard(clubs, '2');
    return 0;
}

output.txt

┌──┐
│♥K│
└──┘
┌──┐
│♠A│
└──┘
┌──┐
│♦9│
└──┘
┌──┐
│♣2│
└──┘