Union in structure : The code is not working with a character as a choice i.e 'y'

Question

struct student {
union {
char name[15];
int roll;
};
int marks;
}stud;
int main()
{
char choice;
scanf("%c",&choice);
switch(choice)
{
case 'y' :
scanf("%s",stud.name);
break;
default:
scanf("%d",&stud.roll);
break;
}
}

Answer 1

~ swim ~ Look, If I use switch(any integer) it's working otherwise with Character not working

Answer 2

~ swim ~ Thank you 😍😍😍😍

Answer 3

~ swim ~

struct student {
union {
char name[15];
int roll;
};
int marks;
}stud;
int main()
{
scanf("%d",&stud.marks);
printf("%d",stud.marks);
char choice;
scanf("%c",&choice);
switch(choice)
{
case 'y' :
scanf("%s",stud.name);
break;
default:
scanf("%d",&stud.roll);
break;
}
}

Answer 4

~ swim ~ after run,its gives no output

Answer 5

I tried it on sololearn ~ swim ~ 😅😅😅