有以下程序:Class Date{public:Date(int y,int m,int d);{year=y;month=m;day=d;}Date(int y=200

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有以下程序: Class Date {public: Date(int y,int m,int d); {year=y; month=m; day=d;} Date(int y=2000) {year=y; month=10; day=1;) Date(Date &D) {year=d.year; month=d.month; day=d.day;} void print() {cout<<year<<“.”<<mo

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