用程序实现二十四点的算法很多，但大都比较繁杂。考虑到凑出结果的可能情况并不是太多，在这里我们将主要靠自己穷举可能的演算式外加循环计算来实现。 -24 points by the procedure of the algorithm to achieve a lot, but are relatively complicated. Taking into account the possible outcome of凑出not too much, where we will mainly rely on their own exhaustive calculus style plus possible to achieve the cycle calculation.