Circle(500,600),500,,,,3将绘制()。A、圆弧B、扇形C、圆D、椭圆
Circle(500,600),500,,,,3将绘制()。
- A、圆弧
- B、扇形
- C、圆
- D、椭圆
相关考题:
●试题六阅读下列程序说明和C++代码,将应填入(n)处的字句写在答卷的对应栏内。【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!c1c2源程序文件test7_3.cpp清单如下:#includeiostream.hclass 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 *c1,Circle *c2){(3)cout"c1c2"endl;elseif ((c1-GetRadius())==(c2-GetRadius()))cout"c1=c2"endl;elseif ((c1-GetRadius())(c2-GetRadius()))cout"c1c2"endl;}void main(){Circle c1;c1.SetRadius (5) ;c1.Print();Circle c2 (10) ;c2.Print();CompareR(c1,c2);}
阅读以下说明和C代码,将应填入(n)处的字句写在的对应栏内。【说明】在一个简化的绘图程序中,支持的图形种类有点(point)和圆(circle),在设计过程中采用面向对象思想,认为所有的点和圆都是一种图形(shape),并定义了类型shape t、 point t和circle t分别表示基本图形、点和圆,并且点和圆具有基本图形的所有特征。【C代码】typedef enum { point,circle } shape type; /* 程序中的两种图形:点和圆 */typedef struct { /* 基本的图形类型 */shape_type type; /* 图形中类标识:点或者圆*/void (*destroy) (); /* 销毁图形操作的函数指针*/void (*draw) (); /* 绘制图形操作的函数指针*/} shape_t;typedef struct { shape_t common; int x; iht y; } point_t; /* 定义点类型, x, y为点坐标*/void destroyPoint (point_t* this) { free (this); printf ("Point destoryed!\n"); } ) /* 销毁点对象*/void drawPoint(point_t* this) { printf("P(%d,%d)", this-x, this-y); }/* 绘制点对象*/shape_t* createPoint (va_list* ap) (/* 创建点对象,并设置其属性*/point_t* p_point;if ( (p_point= (point_t*)malloc (sizeof (point_t)) ) ==NULL) returnNULL;p_point->common, type = point; p_point-common, destroy = destroyPoint;p_point->common.draw = drawPoint;p_point->x = va_arg(*ap, int); /* 设置点的横坐标*/p_point->y = va_arg(*ap, int); /* 设置点的纵坐标*/return (shape_t*)p_ooint; /*返回点对象指针*/}typedef struct { /*定义圆类型*/shape_t common;point_t 4center; /*圆心点*/int radius; /*圆半径*/} circle_t;void destroyCircle(circle_t* this){free((1)); free(this); printf("Circle destoryed!\n");}void drawCircle(circle_t* this) {print f ("C (");(2).draw(this->center); /*绘制圆心*/printf(",%d) ", this->radius);}shape_t* createCircle(va_list4 ap) { /*创建一个圆,并设置其属性*/circle_t4 p circle;if ((p_circle = (circle_t4)malloc (sizeof (circle_t)) ) ==NULL ) return NULL;p_circle->common.type = circle; p_circle->common.destroy = destroyCircle;p_circle->common.draw = drawCircle;(3) = createPoint(ap); /* 设置圆心*/p_circle->radius = va_arg(*ap, int); /* 设置圆半径*/return p_circle;}shape_t* createShape(shape_type st, "') { /* 创建某一种具体的图形*/va_list ap; /*可变参数列表*/&nbs
当对Draw Width进行设置后,将影响( )。A.Line、Circle、Pset方法B.Line、Shape控件C.Line、Circle、Point方法D.Line、Circle、Pset方法和Line、Shape控件
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, int y virtual~DrawCircle() { }}; class RedCircle:public DrawCircle { //绘制红色圆形 public: void drawCircle(int radius, 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,int y,int radius,DrawCircle *drawCircle) (3) { this->x = x; this->y = y; this->radius = radius; } public: void draw() { drawCircle -> (4) ; }}; int main(){ Shape *redCircle=new 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;}
阅读以下说明和Java程序,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Java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。部分接口、类及其关系如图5-1所示。【Java代码】interface?DrawCircle?{? //绘制圆形 public(1) ;}class?RedCircle?implements?DrawCircle?{? ?//绘制红色圆形???????public?void?drawCircle(int?radius,intx,?int?y)??{????????????System.out.println("Drawing?Circle[red,radius:"?+?radius?+",x:"?+?x?+?",y:"?+y+?"]");???????}}class?GreenCircle?implements?DrawCircle?{????//绘制绿色圆形??????public?void?drawCircle(int?radius,?int?x,int?y)?{???????????System.out.println("Drawing?Circle[green,radius:"?+radius+",x:?"?+x+?",y:?"?+y+?"]");??????}}abstract?class?Shape?{????//形状? protected? ? (2)???;? ? public?Shape(DrawCircle?drawCircle)?{? ?this.drawCircle=?drawCircle;? ? ? public?abstract?void?draw();}class?Circle?extends?Shape?{? //圆形? ?private?int?x,y,radius;? public?Circle(int?x,int?y,intradius,DrawCircle?drawCircle)?{? ?(3)???;? this.x?=?x;? ? ? this.y?=?y;? ?this.radius?=radius;? }? ? ?public?void?draw()?{? ? drawCircle.? ?(4)? ?;? ? ? }}public?class?DrawCircleMain?{? public?static?void?main(String[]?args)?{? Shape?redCircle=new?Circle(?100,100,10,? (5) );//绘制红色圆形? Shape?greenCircle=new?Circle(200,200,10,(6) );//绘制绿色圆形? ?redCircle.draw(); greenCircle.draw();? ?}}
当对DrawWidth进行设置后,将影响()。A、Line、Circle、Pset和Line、Shape控件B、Line、Circle、PsetC、Line、Circle、Poine方法D、Line、Shape控件
关于圆和椭圆的绘制说法正确的是()A、都是用Circle方法,参数选择也是一样的B、Circle(60,50),10表示在(60,50)处绘制一个半径为10的椭圆C、Circle(60,50),10....0.6在窗体上绘制垂直方向上的椭圆D、Circle(60,50),10....1.5在窗体上绘制垂直方向上的椭圆
单选题指令“Circle(1000,1000),500,,-6,-3”将绘制()。A画圆B椭圆C扇形D圆弧