21 lines
289 B
Text
21 lines
289 B
Text
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// reverse polish
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mtype = { operator, value }
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chan f = [12] of { mtype, int }
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proctype calc(chan you)
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{ int s, lft, rgt
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chan me = [0] of { int }
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if
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:: f?operator(s)
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run calc(me); me?lft
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run calc(me); me?rgt
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if
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:: s == '+' -> you!(lft+rgt)
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fi
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:: f?value(s) -> you!s
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fi
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}
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