Strings Activity
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1. Create a blank C file with a main() function in it.
2. Declare a global char array of length 256.
3. Write a for() loop in you main function to set every byte in your array to
   the value 0.
4. After your for loop, write your first name into your array, one byte at a
   time. Don't forget to add the NULL terminator at the end of the string.
5. Create a char * (pointer to a character) that points to the beginning of your
   first name.
6. Call the strlen() function to compute the length of your first name and use
   printf() to print out the result. strlen() takes one parameter--a pointer to
   a string (which you created in part 5).
7. Write your last name into your array after your first name. Place the first
   character of your last name immediately after the NULL terminator of your
   first name string.
8. Create another char * that points to the beginning of your last name and call
   strlen() to compute its length. Print out the length like you did in part 6.
9. Combine your first name and last name strings into one by replacing the NULL
   terminator at the end of your first name with a space character (' '). Print
   out the combined string with printf().