Thread: sizeof pointer-to-array -- &array

Hello everyone. I'm trying to find out the size of some expressions.

Code:

#include <stdio.h>

int main(void){
    char   a [100] = {0};
    char (*p)[100] = &a;

    printf("%d\n", sizeof  a[0]);
    printf("%d\n", sizeof &a[0]);
    printf("%d\n", sizeof  a);
    printf("%d\n", sizeof  p);
    printf("%d\n", sizeof &a);

    return 0;
}

The 1st expression is type char and I get 1

The 2nd is type char* (pointer-to-char), and I get 4--because of beeing on a 32 bits plataform, right?

The 3rd one is type char[100] (array-of-100-char), and I get 100

The 4th is type char(*)[100] (pointer-to-aray-of-100-char), and I get 4.

The last one is also type char(*)[100] (pointer-to-array-of-100-chars), but I get 100, shouldn't I get 4?

I've tested this progrman on an MS and on a Borland compiler. Both gave me the same result.

I've looked in various books and the standard and I think I should be getting 4, not 100.

What do you think?

Thanks.

Joey.