CS99 Fall 2002
Lab #9 (11/5/02)
Due 11/8 at noon.


1. Exercise 2.1 from Chapman

   Answer the following questions for the array shown below
                
                --                      --
                | 1.1  0.0  2.1 -3.5  6.0|
       array1 = | 0.0  1.1 -6.6  2.8  3.4|
                | 2.1  0.1  0.3 -0.4  1.3|
                |-1.4  5.1  0.0  1.1  0.0|
                --                      --

   a. What is the size of $array1$?
   b. What is the value of $array1(4,1)$?
   c. What is the size and value of $array1(:,1:2)$?
   d. What is the size and value of $array1([1 3], end)$?


2. Exercise 6.12 from Chapman

   Write a program that accepts an input string from the user 
and determines how many times a user-specified character 
appears within the string. 


3. Exercise 6.15 from Chapman

   Write a program that accepts a series of strings from a
user with the $input$ function, sorts the strings into 
ascending order, and prints them out.


4. Reverse that array

   Write a program that reverses the elements in a 2D array.
For instance, the elements inside the following array
                      --     --
                      | 1 2 3 |
                      | 4 5 6 |
                      --     --
would become
                      --     --
                      | 6 5 4 |
                      | 3 2 1 |
                      --     --

You must use nested loops. Do not use the $sort$ function.