有下列程序:includeUsing namespace std;Class Amount{ int amount;public; Amount(i有下列程序: #include<iostream> Using namespace std; Class Amount{ int amount; public; Amount(int n=O):amount(n){} Int getAmount()const{return amount;} Amount &operator+=(AmountA) {A.*thi

题目
有下列程序:includeUsing namespace std;Class Amount{ int amount;public; Amount(i

有下列程序: #include<iostream> Using namespace std; Class Amount{ int amount; public; Amount(int n=O):amount(n){} Int getAmount()const{return amount;} Amount &operator+=(AmountA) {

A.*this

B.this

C.&amount

D.amount


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更多“有下列程序:#include<iostream>Using namespace std;Class Amount{ int amount;public; Amount(i ”相关问题
  • 第1题:

    阅读下列说明和C++代码,填写程序中的空(1)~(6),将解答写入答题纸的对应栏内。
    【说明】
    以下C++代码实现一个简单绘图工具,绘制不同形状以及不同颜色的图形。部分类及其关系如图6-1所示。



    【C++代码】
    #include?#include?using?namespace?std;class?DrawCircle?{??????//绘制圆形,抽象类? ? ? public: (1);//定义参数为?int?radius,?int?x,?inty? ?virtual~DrawCircle()?{?}};class?RedCircle:public?DrawCircle?{????//绘制红色圆形? ? ? ? public: void?drawCircle(intradius,?int?x,?int?y)?{cout?<?drawCircle?=?drawCircle;? }? ?virtual~shape()?{?}? public:? ?virtual?void?draw()?=?0;};class?Circle:public?Shape?{????//圆形? ? private:? ? ?int?x,y,radius;? ? public:? Circle(int?x,inty,int?radius,DrawCircle?*drawCircle)? (3)? {? this->x?=?x;? ?this->y?=?y;? ? this->radius?=?radius; }? ? ? public:? void?draw(){? drawCircle?-> (4); }};int?main(){Shape?*redCirclenew?Circle(100,100,10,????(5)????);//绘制红色圆形? Shape?*greenCircle=new?Circle(100,100,10, (6)??);//绘制绿色圆形redCircle >draw();? ?greenCircle?->draw();? ?return?0;}


    答案:
    解析:
    (6)(1)void drawCircle (int radius,int x,int y)
    (2)DrawCircle*drawCircle
    (3)drawcircle
    (4)drawCircle(radius,x,y)
    (5)new RedCircle()
    (6)new GreenCircle()【解析】
    第一空是填接口里面的方法,在接口的实现里面找,可以发现应该填void drawCircle (int radius,int x,int y)。
    第二空可以根据后面this drawCircle=drawCircle判断,这里应该有一个drawCircle属性,因此应该填)DrawCircle drawCircle。
    第三空这里填drawcircle,用-> drawcircle来引用父类的成员。
    第四空调用drawCircle(radius,x,y)方法。
    第五、六空分别创建一个红色圆形对象和一个绿色圆形对象作为Circle里面的实参。

  • 第2题:

    BookStore数据库中有销售明细表OrderDetail(OrderCode, BookCode, Amount) 查询销售总量前20%的图书,并按总销量降序排列。SQL语句: SELECT TOP 20 PERCENT Bookcode As 书号, SUM(Amount)As总销量 ROM OrderDetail GROUP BY Bookcode ORDER BY ________

    A.Amount DESC

    B.SUM(Amount) DESC

    C.COUNT(Amount) DESC

    D.ADD(Amount) DESC


    INSERT INTO OrderDetail(OrderCode, Amount, BookCode) VALUES('08110801',3, '0701');INSERT INTO OrderDetail(OrderCode, BookCode, Amount) VALUES('08110801', '0701', 3);INSERT INTO OrderDetail VALUES('08110801', '0701', 3)

  • 第3题:

    写出下面代码的运行结果。def addInterest(balance,rate): newBalance=balance*(1+rate) balance=newBalance def main(): amount=1000 rate=0.05 addInterest(amount,rate) print (amount) main()


    A

  • 第4题:

    7、BookStore数据库中有销售明细表OrderDetail(OrderCode, BookCode, Amount) 查询销售总量前20%的图书,并按总销量降序排列。SQL语句: SELECT TOP 20 PERCENT Bookcode As 书号, SUM(Amount)As总销量 ROM OrderDetail GROUP BY Bookcode ORDER BY ________

    A.Amount DESC

    B.SUM(Amount) DESC

    C.COUNT(Amount) DESC

    D.ADD(Amount) DESC


    SUM(Amount) DESC

  • 第5题:

    【单选题】BookStore数据库中有销售明细表OrderDetail(OrderCode, BookCode, Amount)查询销售总量前20%的图书,并按总销量降序排列。SQL语句: SELECT TOP 20 PERCENT Bookcode As 书号, SUM(Amount)As总销量 ROM OrderDetail GROUP BY Bookcode ORDER BY ________

    A.Amount DESC

    B.SUM(Amount) DESC

    C.COUNT(Amount) DESC

    D.ADD(Amount) DESC


    B