加上这句(tmpArray.at(3) == 0Xcf)就警告
(tmpArray.at(3) == 0X01)就没有警告，
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请教下这是为何？
加上这句(tmpArray.at(3) == 0Xcf)就警告
(tmpArray.at(3) == 0X01)就没有警告，
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找到答案：https://www.cnblogs.com/citrus/p/12965339.html
如果需要比较的话，用 array.at(0) == '\xff' 表示，而不是 array.at(0) == 0xff 。
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谢谢，刚好有用
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