68 lines
2.1 KiB
Plaintext
68 lines
2.1 KiB
Plaintext
Have begin implementation of Jive, working on state 8.
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Through Tuesday, 9/11 made good progress, but still
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some problems.
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JiveVPL.save can be copied to JiveVPL.class to
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allow running my VPL interpreter (version that
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takes the memory produced by Jive.java) on
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a given VPL file produced by Jive.
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As of Sunday, 9/16/2018, at noon, Jive is initially
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implemented, testing on a few test cases
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(may still have errors, of course, but is useable
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for demonstrating the desired translation from
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Jive to VPL)
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All the tests in the folder Tests seem to be working.
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To run my VPL simulator on a VPL program produced by
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Jive, you need to compile IntPair.java and
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then
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copy VPL.save to VPL.class
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(I'm hiding my VPL source code so Project 1 isn't ruined).
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September 17:
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in class we wrote a little Jive program, named "sept17",
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that was supposed to ask the user for n and
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then store in an array n followed by the first n
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Fibonacci numbers (we left off the first 1, which was
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fine for our purposes), and then
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display that array.
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When we translated the Jive program to VPL and then
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ran the VPL program, the behavior was weird.
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After class I found the following errors in the
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Jive program (yay---not in Jive.java, my translator):
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first, we forgot to put a Halt command in the
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"main" at the end, so after doing whatever work
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was in "main", it continued into the next function,
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or something. At any rate, it was bad, and was
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cured by putting in the Halt command.
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second, nothing was displaying. I figured out
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after a while that we had forgotten to store
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the value n at offset 0 in the array. When I
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put in the code:
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size -> Put array 0,
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the program behaved as desired, except at the end
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it crashed. After some work, I realized that I
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(with no one else to blame), should have done
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n -> Put array 0
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With that change, sept17 worked perfectly
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(up to n==45---for larger n, integer
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overflow produced nonsensical results at the
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end the sequence).
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The punchline is, we didn't find a problem with
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Jive.java!
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