Comp 1672
Homework 5
Due Tuesday, Feb 11, 2003

1 and 2.  Do problems 1 and 2 from Chapter 12

3.  Write a class Two_by_two that has as its data member a vector of floats of
length 4. Write public functions "set" to set the values of the elements
to elements input from the keyboard, "print_out" to print to the screen
the values in the vector, and "det" to return the float value
vec[0]*vec[3]-vec[1]*vec[2]. Write a simple main function to demonstrate each.