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C++\u4e2d\u7eaf\u865a\u51fd\u6570\u5f62\u5f0f\u4e3a\uff1avirtual void print()=0;<\/p>\n\n\n\n

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3.\u62bd\u8c61\u7c7b<\/strong><\/p>\n\n\n\n

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5.\u5c0f\u7ed3<\/strong><\/p>\n\n\n\n

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