3460:430/530 Theory of Programming Languages Fall 2005

Dr. C.-C. Chan Due: 10/9/05

Project #3 (20 pts)

Problem: Based on Project 2, extend the language to allow the following features:

1. Dynamic typed variables with the values: integers, float, characters, and character strings.

Characters are delimited by single quotes and strings are delimited by double quotes as in C++.

Maximum string length is assumed to be 256 with ‘\0’ terminator.

2. Only operation of char allowed is assignment. Operations of strings include: assignment and cancatenation (using ‘+’ symbol),

Implementation:

1. Add new token types for built-in functions.

2. Add new rules and corresponding actions to reflect the new features.

3. Extend yylex function to recognize new features.

4. You must create a symbol.c source file to implement the symbol table.

Error Checking:

Add operation of strings with numbers

Submissions:

1. Name your source files as "LastName_p3.y". "LastName_p3.h", and "LastName_symbol.c".

2. Send the source file by e-mail to sk39@uakron.edu and chan@cs.uakron.edu

3. The project is due by midnight of the due day.