#include <stdio.h>

union hold{

        int digit;

        double big;

        char letter;

};

int main(){

        union hold a;

        a.letter = 'R';

        union hold b = a;

        union hold c = {};

        union hold d = {

                .big = 99.9

        };

        union hold *ps = &a;

        printf("---%c---",ps->letter);

        printf("---%c---",a);

}