Same thing with cmp, that's just saying greater than, and greater than now can apply to strings, it can apply to floats, it could apply to points, it could add other pieces into it.

是不是相等？,这跟cmp是一样的，这个只不过是说大于，大于现在可以应用于字符串，可以应用于浮点数，可以应用于点。

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