Hands-On One

1. Compile, link and run the Hello World examples. These are in _hello_one, _hello_subrout and _hello_using_mod.
   
   
2. Compile, link and run the quadratic example --- the source code is within _quadratic_one.
   
   
3. Add a new SUBROUTINE, called for example Diagnose, which computes the determinant of the equation and outputs a message indicating whether to expect two distinct real roots, complex roots or one repeated root.