Create a calculator program using FLex and BISON. Your program
should be named calc and should take 1 input file (you can and
should use the calc program from the previous lab as the
Calc should print out the AST of the expression in dot format.
For example, assume there is an input file input.txt
that contains the text 1+2+3. If you run
./calc input.txt | dot -Tpng -o dfa1.png
Then the output file dfa1.png should look like:
Note that this dot file uses a slightly different format than that
described in the video. In particular, it uses the "record" shape
for the nodes. The dotfile is as follows:
Create a tarball consisting of a single directory with all of your work in it,
such as code or written answers.
If you have any auxiliary files (READMEs, Makefiles, etc.), be sure
to include those as well.
Name your work directory l3 and name
the tarball l3.tgz.
Upload your tarball to the L3 Canvas assignment.
Labs will be graded under one of following criteria:
You will automatically be given full credit for the labwork if the GTA
determines that your participation in the lab was meaningful - i.e. you
attended the lab session and used the time to make a good-faith attempt to
complete the work. It is the sole discretion of the GTA to determine
if you put in sufficient effort. Even if you expect an effort-based grade,
you should turn in your (possibly incomplete) work.
If you do not participant meaningfully in lab (i.e. you do not attend the
lab session), your grade will be assessed based on the correctness of your
Advice: How to Approach Labs
The two-criteria grading scheme above is designed to avoid wasting your time.
You should not feel obligated to attend the lab, and in fact should only
do so if you want help from the GTA on the labwork assignment
or whatever project is currently in progress. Here's a handy flowchart
for how I suggest you approach lab: