ss23-git-1-2's Issues
Subtraction test expects wrong answer
The string 2 1 -
should be "parsed" as the infix expression 1 - 2
. The test instead writes 2 1 - = 1
, as if it were being read 2 - 1
.
No unit tests present
TODO
META: Other smaller tasks
- Add constants:
e
,pi
- Add unary operators:
loge
Add modulo operation (`%`)
The modulo operation is equivalent to dividing an integer by another integer, and returning the remainder. Many programming languages use %
as an operator to denote modulo.
e.g. 10 % 3 = 1
or in RPN terms, 3 10 % = 1
META: Handout
TODO: Worksheet (questions and answers), or reference?
Add mode to work on integers instead of floats
The calculator currently parses floats and uses float operations (e.g. /
is float division, where 3 / 2 = 1.5
). We could provide an option to work in "integer mode", parsing integers and using integer operations (e.g. //
for floor division, where 3 // 2 = 1
).
META: Would give us a merge conflict if we branch from talk start, and try to merge near talk end.
Improve error handling for popping from an empty stack
ie stack underflow
TODO
Allow multiple spaces between operators/operations
The string parser only permits a single space between each element e.g. 1 2 +
. Entering 1 2 +
will fail. Double spaces at least would be sensible to permit, in case the user prefers that formatting.
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