Why is a pointer to a pointer incompatible with a pointer to an array?

Question

OK, I\'m having trouble understanding pointers to pointers vs pointers to arrays. Consider the following code:

char s[] = \"Hello, World\";
char (*p1)[] = &s         


        

Answer 1

Here's the sample that works, plus printouts of pointer addresses to make things simple to see:

#include 
char s[] = "Hello, World";
char (*p1)[] = &s;
char *p2 = (char*)&s;

int main(void)
{
   printf("%x %x %x\n", s, p2, *p2);
   printf("%x\n", &s);    // Note that `s` and `&s` give the same value
   printf("%x\n", &s[0]);
   printf("%c\n", **p1); 
   printf("%c\n", *p2);
}