考题
有以下程序:includeusing namespace std;definePl 3.14Class Point{private:int x,y
有以下程序: #include<iostream> using namespace std; #definePl 3.14 Class Point {private: int x,y; public: Point(int a,intB) {X=a; y:b;} int getx() <return x;} int gety() {return y;}}; class Circle:public Point {priA.314B.157C.78.5D.153.86
考题
有以下程序:include include using namespace std;class base{private: cha
有以下程序: #include <iostream> #include <string> using namespace std; class base { private: char baseName[10]; public: base ( ) { strcpy (baseName, "Base"); } virtual char *myName() {A.DerivedBaseB.BaseBaseC.DerivedDerivedD.BaseDerived
考题
有以下程序:includeincludeusing namespace std; class point{private:double
有以下程序: #include<iostream> #include<math> using namespace std; class point { private: double x; double y; public: point(double a,double B) { x=a; y=b; } friend double distance (point a,point B) ;A.1B.5C.4D.6
考题
有以下程序:includeusing namespace std;class BASE{private: char c;public: BASE(c
有以下程序: #include <iostream> using namespace std; class BASE { private: char c; public: BASE(char n):c(n);{} virtual~BASE() { cout<<c; } }; class DERIVED:public BASE { char c; pA.XYB.YXC.XD.Y
考题
有以下程序:include include using namespace std;class point{private: doub
有以下程序: #include <iostream> #include <math> using namespace std; class point { private: double x; double y; public: point(double a,double b) { x=a; y=b; } friend double distance(point a,point b) ; }; double distance(point a,point b) { return sqrt ((a.x-b.x)* (a.x-b.x)+(a.y-b.y)*(a.y-b.y)); } int main ( ) { point pl(1,2); point p2 (5, 2); cout<<distance (pl,p2) <<end1; return 0; } 程序运行后的输出结果是( )。A.1B.5C.4D.6
考题
有以下程序:include using namespace std;define PI 3.14class Point{ private:int
有以下程序: #include <iostream> using namespace std; #define PI 3.14 class Point { private: int x,y; public: Point(int a,int b) { x=a; y=b; } int getx() { return x; }A.314B.157C.78.5D.153.86
考题
有以下程序,程序运行的结果是 ______。includeincludevoid main(){charx
有以下程序,程序运行的结果是 ______。 #include<iostream.h> #include<string.h> void main(){ char x[]= "C++" ,y[10]= "C++" ; cout<<sizeof(x)/sizeof(char)<<“,”<<sizeof(y)/sizeof(char); }A.3 3B.4 4C.4 10D.10 10
考题
若有以下程序:include using namespace std;class point{private: int x, y;public:
若有以下程序: #include <iostream> using namespace std; class point { private: int x, y; public: point ( ) { x=0; y=0; } void setpoint(int x1,int y1) { x=x1; y=y1;A.12,12B.5,5C.12,5D.5,12
考题
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;}