#include <stdio.h>

int main()
{
   char c = 'a';
   char * const cp = &c;

   printf("%c %c %p\n", c, *cp, cp);

//   cp = &c;

   printf("%c %p %c %p\n", c, &c, *cp, cp);

//   char d = 'b';
   c = 'b';

//   cp = &d;

   printf("%c %p %c %p\n", c, &c, *cp, cp);

   return 0;
}