Reverse Engineering: A Case Study Using Quadratic Equation 
Yolanda Wall, Kimareanna Ross, Regina Ratclif, 
and Y.B.Reddy (ybreddy@vax0.gram.edu)
Grambling State University
Dept. of Mathematics and Computer Science
Grambling, LA 71245

Abstract: Solution to quadratic equation was developed using software
life-cycle model.  The program was given as input to CADRE/TEAMWORK-Ensemble
(Reverse-Engineering Package) on RISC-6000 system.  The output was structured
charts, test graphs, control-flow diagram, local variables, global variables,
lines of code (LOC) executed, and statistical data. The Ensemble output was
studied and control diagram was created.  The C++ structure to the given 
C-program was generated with the help of control diagrams.  Using cut and 
paste method the C-code was pasted in C++ structure.  The C++ program was
tested for all possible test data.  The new program is more flexible for
maintenance and new additions (upgrades).  The technique was used to 
re-engineer the backpropagation program written in C-language1.

Key words: life-cycle, structured charts, test graphs, 
control-flow diagram, local variables, global variables, 
re-engineer, backpropagation.

1.      Y.B.Reddy

Reverse Engineering: A case study using neural network software,
Third Golden West International Conference on Intelligent Systems, June 6-8, 
1994, Las Vegas.

Intelligent Systems: West International Conference on Intelligent Systems
Kluwer Academic Publishers, 1995, pp 475-482; ISBN: 0-7923-3422-1

This research work was supported by the Office of Naval Research.