A simple X program

The framework developed in the basic programming and development is used to create a simple X based application that will draw lines.

Please notice the following:

All points are now integers, not reals.
To maintain simplicity, this is a very poor motif program. This will be changed later.
The line drawing algorithm is from the book, page 35. This needs much improvement, see Assignment one for some more details.

The main program has been modified quite a bit. It no longer is a program driven application, rather, it is much closer to an event user application. In addition to this, the Makefile has been modified to include the Motif and X libraries. Please be cautioned, we only have Motif on our HP machines. This program will not compile or run on the Sun workstations. The files Xroutines.c and Xroutines.h have been added. This provides "hidden" access to the basic X calls to draw primitives. line.c has been modified to include the dc_drawline routine. Only minimal changes have been made to all other files.