hzhu 7 gadi atpakaļ
vecāks
revīzija
9cc533ce01
1 mainītis faili ar 0 papildinājumiem un 46 dzēšanām
  1. 0 46
      bee

+ 0 - 46
bee

@@ -1,46 +0,0 @@
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-class Stack:  
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-    def __init__(self):  
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-        self.items = []  
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-          
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-    def isEmpty(self):  
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-        return len(self.items)==0   
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-      
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-    def push(self, item):  
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-        self.items.append(item)  
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-      
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-    def pop(self):  
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-        return self.items.pop()   
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-      
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-    def peek(self):  
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-        if not self.isEmpty():  
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-            return self.items[len(self.items)-1]  
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-          
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-    def size(self):  
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-        return len(self.items)
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- 
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-   
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-def postfixEval(postfixExpr):  
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-    operandStack = Stack()  
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-    tokenList =postfixExpr.split()  
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-   
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-    for token in tokenList:  
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-        if token in"0123456789":  
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-           operandStack.push(int(token))  
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-        else:  
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-            operand2 =operandStack.pop()  
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-            operand1 =operandStack.pop()  
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-            result =doMath(token,operand1,operand2)  
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-            operandStack.push(result)  
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-    return operandStack.pop()  
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-   
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-def doMath(op, op1, op2):  
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-    if op == "*":  
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-        return op1 * op2  
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-    elif op == "/":  
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-        return op1 / op2  
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-    elif op == "+":  
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-        return op1 + op2  
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-    else:  
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-        return op1 - op2  
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-   
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-print(postfixEval('7 8 + 3 2 + /'))