There are several things woth noticing about what is common and what is not common:
- Some operators take 2 parameters, e.g.,
add - Some operators take 1 parameter, e.g.,
factorial - Currently all operators return a value, given what you know about calculators, is that a safe assumption?
- Hint, it is not. We will eventually have operatos like
swapthat reverse the top two values, ordropthat simply gets rid of a values
- Hint, it is not. We will eventually have operatos like
- Eventually there might be operators that consume no values but actually put values on the stack, e.g.,
random
About the only thing that will ultimately be common across all of the math operators will be that they:
- consume 0 or more operands
- produce 0 or more results
So the only thing that all of the operators have in common will be the RpnStack.
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