#include <stdio.h>
#include <stdlib.h>
 
int main()
{
    char a, *b;
 
    a = 'a'; // what numeric value is being stored in the variable a? Why?
    b = &a;
 
    printf("a contains     '%c'\n", a);
    printf("a's address is 0x%X\n", &a);
    printf("-----------------------\n");
    printf("b dereferenced contains '%c'\n", *b);
    printf("b contains     0x%X\n", b);
    printf("b's address is 0x%X\n", &b);
 
    return(0);
}

• What do the variables a and b have in common?
• Where do they differ?
• If you change variable a, what will happen to b?
• If you change variable b, will it impact a?
• How can you change b without breaking things?