make pic-lib runs in r5rs compatible mode
added draw points function to the pic-lib
added pi calculate in arithmetic lib
added paint-hires functions in pic-lib
added more curve printing support in pic-lib
- more robust pointer->painter procedure, filter null pointers
- could paint curves and curve in a scale
finished assignment 3.graphing
rename the assignment files
completed the project 2 Prisoner's Dilemma
- the exercise files
- library to be included in
- edited files of PDF
finished the section2.3
finished section2.4 tagged data
added term_evaluator working code to library
fixed a bug in the source code provided for term transform evaluator
modified the source code to be used in racket scheme:
- if form should have an else part
- filter doesn't need to be declared
summary of all the patches required to run the term transformer in racket