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在基类中的()成员不允许外界访问,但允许派生类的成员访问,这样既有一定的隐藏能力,文提供了开放的接口。
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C+ + 程序设计(04737)
发表:2024年09月12日 02时09分19秒
作者:
admin
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(10)
在基类中的()成员不允许外界访问,但允许派生类的成员访问,这样既有一定的隐藏能力,文提供了开放的接口。
【正确答案】:保护
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对顾客的差异化进行分析,()提出RFM(R为recent,顾客最近一次购买的情况;F为frequent,购买频率;M为money,花费金额)模型。
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