/*
 * SelfTest
 * Chapter 11
 * By John Stile
 */
1. For each of the following, write a single statement.

1a. Declare variable pnum to point to an object of type int

ANSWER: int * pnum

1b. Assign the address of variable num to integer pointer pnum.

ANSWER: pnum=#

1c. Print the value of the object pointed to by pnum.

ANSWER:  printf("%d\n", *pnum);

1d. Increment the value of the object pointed to by pnum by 10.
    aka add 10.

ANSWER: *pnum+=10;

1e. Print the address of num using pnum.

ANSWER: printf("%p\n", pnum);

1f. Change the value of num to 99 using pnum.

ANSWER: *pnum=99;

2. Consider the following statment.
  char greeting[]="hello";
  char *p=greetings;

2a. How many characters does the char array gretting contain?

ANSWER: 6 (hello +'\0')

2b. What value does the character pointer have?

ANSWER: p holds the value of &greeting[0]

2c. Make a pointer p get the address of the second element of greeting using p.

ANSWER:  printf("The second element of greeting is %c\n", *(p+1) );

2d. Change the character 'o' to 'a' using p.

ANSWER: *(p+4)=a

2e. Change all the characters in greeting to uppercase letters using a loop.

for (ii=0; *(p+ii); ii++) // initialize position counter to 0
                          // while value-at pointer not NULL, do block
                          // increment position counter
{
  *(p+ii)-=32; // (value-at pointer) = (value-at pointer) - 32
}

3. Write a function named copystr that receives two pointers to arrays of 
   strings with the same size.  
   The first pointer str1 points to a string which has contents, 
   but str2 points to a blank array.

ANSWER: See SelfTest.question3.c