C2参数不包括()。A.cell_bar_qualifyB.temporary_offsetC.penalty_timeD.cell_bar_access_class
C2参数不包括()。
A.cell_bar_qualify
B.temporary_offset
C.penalty_time
D.cell_bar_access_class
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阅读下列程序说明和C++代码,将应填入(n)处的字句写在对应栏内。[说明]①为类Circle增加一个构造函数,该函数有一个参数,并在构造时将该参数值赋给成员 radius。将该函数实现为一个非内联函数,并且使用参数列表的方式将类成员赋值。②为类Circle增加一个成员函数print(),使得可以输出有关圆的信息,比如下列程序Circle c;c. SetRadius(5);c. Print();将输出:The circle has radius of 5!③完成友元函数void CompareR(Circle *c1,Circle *c2)的定义,在屏幕中输出c1与c2比较radius大小结果,要求使用if - else结构完成。输出结果如下:The circle has radus of 5 !The circle has radius of 10 !cl <c2源程序文件test7_3, cpp 清单如下:include < iostream, h >class Circle {public:Circle( ) :radius(5) {}(1)void SetRadius(int r) { radius = r; }int GetRadius() { return radius; }(2)friend void CompareR(Circle * c1,Circle * c2);private:int radius;};void CompareR(Circle * c! ,Circle * c2){(3)cout << "c1 > c2" << endl;elseif ( (c1 -> GetRadius( )) == (c2 -> GetRadius( )))tout < <"c1=c2' < < endl;elseif ( (c1 -> GetRadius( )) < ( c2 -> GetRadius( )))cout <<"c1<c2" <<endl;void main( )Circle c1c1. SetRadius(5)c1. Print( )Circle c2(10);c2. Print( )CompareR(c1 ,c2);}
检索选修课程“C2”的学生中成绩最高的学生的学号。正确的SELECT语句是()。A.SELECT SNO FORM SC WHERE CNO='C2' AND GRADE >= (SELECT GRADE FORM SC WHERE CNO='C2' );B.SELECT SNO FORM SC WHERE CNO='C2' AND GRADE IN (SELECT GRADE FORM SC WHERE CNO='C2' );C.SELECT SNO FORM SC WHERE CNO='C2' AND GRADE NOT IN (SELECT GRADE FORM SC WHERE CNO='C2' );D.SELECT SNO FORM SC WHERE CNO='C2' AND GRADE >= ALL (SELECT GRADE FORM SC WHERE CNO='C2' );