解题思路: 1)中缀表达式转后缀表达式 2)依据后缀表达式计算 参考链接: https://www.cnblogs.com/lzyws739307453/p/12907662.html#tid-dxYffc https://www.bilibili.com/video/BV1xp4y1r7rc/?spm_id_from=333.788.recommend_more_video.-1&vd_source=62437a29d0413d5696b2f8935524e862 https://www.bilibili.com/video/BV1iz4y1k7C...