程序完成后的执行结果为：90#include #include using namespace std; class Student{private:string name; int score; public:Student(string n) {name=n;}________（1）__________ {score=s; }int getScore() {return score;}int averageScore(Student stu) {_________（2）_________}};int main(){Student stu1('tom'),stu2('jerry'); stul.setScore(100);stu2.setScore(80);cout< < stul.averageScore(stu2); return 0;}

程序完成后的执行结果为：x＝6，y＝8，z＝10#include < iostream >using namespace std; class TwoCord {private: intx,y; public:TwoCord(int x,int yy) ){_______（1）___________y=yy; }void display() {cout< < "x="< < x< < "y="< < y; }}；class ThreeCord {int z; public:ThreeCord(int x,int yy,int zz):TwoCord(x,yy) {z=zz; }void display(){________（2）__________cout< ",z="< < z;}}；int main()ThreeCord c(6,8,10); c.display();return 0;}

程序完成后的运行结果为：100#include <iostream> using namespace std; class Singleton {public: int gld;static Singleton* getInstance() {if(instance==NULL) instance=new Singleton(); return instance;}private:Singleton() { }static Singleton* instance; };________（1）__________int main() {_________（2）_________p->gld=100; cout<<p->gld; return 0; }

程序完成后的运行结果为：10 30 50#include <iostream>using namespace std; class Container {public:Container(int defVal=10) {for(int i-0;i<3;i++) _____（1）_______}________（2）__________{return item[index];}int Item(int index)const{return item[index];} private:int item[3]; };int main(){Container vc;const Container cc(20); int i;for(i=0;i<3;i++)vc.ltem(i)+=i*cc.ltem(i); for(i=0;i<3;i++)cout<<vc.Item(i)<<""; return 0;}

程序完成后的运行结果为：（4，6）#include < iostream >using namespace std; class TwoCord{int x,y; public:TwoCord(int xx,int yy) {X=XX; y=yy; }_______（1）_________(const TwoCord &c1,const TwoCord&c2){__________（2）________}void display(){cout< < (*< < x< < ,"< y< ")"; }}；int main(){TwoCord cl(1,2),c2(3,4); cl=c1+c2;c1.display(); return (); }

对C++语言的描述正确的是

下列选项中可以取代语句“namespace{int x,y;}”的是

把v1(int v1;)和v2(char v2[]=”ABCDW";)分别作为第一参数和第二参数来调用函数f1,已知函数f1的原形是“void f1(int *a,char *b);”,则正确的调用语句是

要发生动态绑定，则调用虚函数时应使用

关于类和对象的描述不正确的是