Solution for Exercise 18-10

ex1810

#include <stdio.h>

int main()
{
    char lead;
    char *sidekick;

    lead = 'A';        /* initialize char variable */
    sidekick = &lead;  /* initialize pointer IMPORTANT! */

    printf("About variable 'lead':\n");
    printf("Size\t\t%zd\n",sizeof(lead));
    printf("Contents\t%c\n",lead);
    printf("Location\t%p\n",&lead);
    printf("About variable 'sidekick':\n");
    printf("Contents\t%p\n",sidekick);
    printf("Peek value\t%c\n",*sidekick);

    return(0);
}

Output

About variable 'lead':
Size            1
Contents        A
Location        0x7ffee2adda2b
About variable  'sidekick':
Contents        0x7ffee2adda2b
Peek value      A

Notes

* As with the & operator, the compiler is wise enough to determine when * prefixes a pointer variable name. So although the * is also the multiplication operator, it can hug a pointer variable's left side and become a unary pointer operator.

Exercise ex1811 →