The unavailability of comprehensive, user-friendly programming environments is
one of the most imposing obstacles to the development and testing of software
applications. The most critical advances needed to remove the obstacles are
improved tools for program analysis, visualization, evaluation, and debugging.
In this project, we use a tool, Sage++, to model 
control flow using an internal representation of the source code called a
program tree, a form similar to an abstract syntax tree.  
We use the $xvcg$ tool to visualize the control flow graph. 
To facilitate program evaluation, the control flow graph representation is 
used to compute software complexity using McCabe's cyclomatic complexity 
measure. 
Since cyclomatic complexity does not include program exceptions
in its consideration, we extend the complexity measure to
include $C^{++}$ exceptions, since they alter flow of control and thereby 
affect the cyclomatic complexity of the program.