Description: 1) Use a preorder traversal sequence construction algorithm, using the linked list of binary, indicating that the arithmetic expression 2* 3+6/3 of identifier tree
2) Find the identifier tree preorder, inorder, postorder sequence, stored in the array and display the results
3) Find the number of leaf nodes in the tree
Additional: 3) Use the order sequence to evaluate the expression (using a stack implementation)
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1.txt