The establishment of test database file, the subject of n randomly generated topics related to addition, subtraction, mixed operations with parentheses use the value of the expression stack solution ready to quit to preserve the historical scores, can look back at history, and history gives the comparison of scores Evaluation 保留历史分数，能回顾历史，给出与历史分数比较后的评价

罗文凤（利用栈求表达式的值）\利用栈求解表达式的值任务书.doc
............................\源代码\markrec.txt
............................\......\n_rec.txt
............................\......\shitiku.txt
............................\......\Stack.c
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罗文凤（利用栈求表达式的值）

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