Created
April 12, 2011 14:33
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| def buildParseTree(fpexp): | |
| fplist = fpexp.split() | |
| pStack = Stack() | |
| eTree = BinaryTree('') | |
| pStack.push(eTree) | |
| currentTree = eTree | |
| for i in fplist: | |
| if i == '(': | |
| currentTree.insertLeft('') | |
| pStack.push(currentTree) | |
| currentTree = currentTree.getLeftChild() | |
| elif i not in '+-*/)': | |
| currentTree.setRootVal(eval(i)) | |
| parent = pStack.pop() | |
| currentTree = parent | |
| elif i in '+-*/': | |
| currentTree.setRootVal(i) | |
| currentTree.insertRight('') | |
| pStack.push(currentTree) | |
| currentTree = currentTree.getRightChild() | |
| elif i == ')': | |
| currentTree = pStack.pop() | |
| return eTree |
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