C language -- displaying unicode output not as expected!

Question

Trying to display a board using unicode "line" parameters: "diamond shapes with question mark" show up radomly!

Any suggestions?

#include <stdio.h>

int main()
{

/* 01 */        printf("\U00002554\U00002550\U00002564\U00002550\U00002564\U00002550\U00002564\U00002550\U00002564\U00002550\U00002564\U00002550\U00002564\U00002550\U00002564\U00002550\U00002564\U00002550\U00002564\U00002550\U00002564\U00002550\U00002557");
               
    return 0;
}

Answer 1

Please, read this: https://stackoverflow.com/questions/526430/c-programming-how-can-i-program-for-unicode