#include <stdio.h>
             int main()
             {
        
             int 17;
             int *b;
             char c;
             char *d;

             a = 17;
             b = &a;
             c = 'X';
             d = &c;

             printf("address of a is: %p\n", &a);
             printf("address of b is: %p\n", &b);
             printf("address of c is: %p\n", &c);
             printf("address of d is: %p\n", &d);
             printf("-----------------------------\n");

             printf("a contains: %d\n", a);
             printf("b contains: %p\n", b);
             printf("c contains: '%c' (%hhd)\n", c, c);
             printf("d contains: %p\n", d);
             printf("-----------------------------\n");

             printf("b dereferenced is: %d\n", *b);
             printf("d defeferenced is: '%c' (%hhd)\n", *d, *d);
             printf("-----------------------------\n");

             printf("a is %d bytes\n", sizeof(a));
             printf("b is %d bytes\n", sizeof(b));
             printf("c is %d bytes\n", sizeof(c));
             printf("d is %d bytes\n", sizeof(d));
             printf("-----------------------------\n");

             *b = 32;
             *d = 'J' - 6;