Why can't I specify a storage class for formal function parameters?

Question

When I do as below, the code works fine:

#include <stdio.h>
void test( int a)
{
 printf("a=%d\n",a);   
}

int main()
{
    test(10);
    return 1;
}

But when I do

#include <stdio.h>
void test( auto int a) // Or static int a Or extern int a
{
 printf("a=%d\n",a);   
}

int main()
{
    test(10);
    return 1;
}

It generates an error,

error: storage class specified for parameter 'a'

Why is this a mistake? What happens inside (memory management)?

But it works fine without errors when I do this:

void test( register int a)
{
 printf("a=%d\n",a);   
}

Why is this?

Answer 1

To quote first C11, chapter 6.7.6.3

The only qualifier for the storage class that must be specified in the parameter declaration is register.

So this is explicitly stated in the standard.

, , , static/extern, , , .

• ; , ? , static , auto .

• , extern .

---

, C11, main() int main(void), .