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