单项选择题
有类定义如下:气 class Type { public: Type (int i=0); Tvpe operator -(int); friend Type operator + (Type, Type ); private: int val; 若有对象定义Type cl;则下列语句序列中,错误的是()
A.Type(3)+c1; B.cl+Type(3); C.3-cl; D.c1-3;