Answer / guest

1.static const volatile int i;
is valid cos it is possible to declare a variable with
multiple qualifiers.

2.register struct a{ } ; is invalid but it will be valid
when u doesnt have body of the structure.

ie., struct a;

3.static register int i; is also invalid cos, here
different storage classes are assigned to a single
variable.

Answer / banavathvishnu

register struct test
{
int i;
char c;
float f;
};

int main()
{
struct test t;
t.c = 'v';
printf("%c",t.c);


getch();
}
The above code is valid
The below code is invalid

register struct test
{
};

int main()
{
struct test t;
t.c = 'v';
printf("%c",t.c);


getch();
}

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