Enya, urang bisa ngamutahirkeun program pikeun dianggo dina input téks kalawan operasi matematika dasar. Ieu hiji conto palaksanaan: ```python kelas Kalkulator: def init(self): lulus def evaluate(self, ekspresi): tokens = expression.split() stack = [] i = 0 bari i < len(tokens): if tokens[i].isdigit(): stack.append(float(tokens[i])) sejenna: if tokens[i] ==+: a = stack.pop() b = stack.pop (a + b) elif tokens[i] ==-': a = stack.pop) b = stack.pop (a) appendalub - a) elif (a) (a) (a) (a) (a) (a) (a) (a) (a) (
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