下列程序的执行结果是______。 include class Student { public: Student(int xx){x= 下列程序的执行结果是______。include＜iostream.h＞class Student{public:Student(int xx){x=xx;}virtual float calcTuition( );protected:int x;};float Studertt::calcTuition( ){return float(x*x);}class GraduateStudent:public Student{public:GraduateStudent(int xx):Student(xx){}float calcTuition( );};float Graduatestudent::calcTuition( ){return float(x*2);}void main( ){Student s(20);GraduateStudent gs(30);cout＜＜s.calcTuition( )＜＜" "＜＜gs.calcTuition( )＜＜endl;//计算学生s和研究生gs的学费}
下列程序的执行结果是______。 include class Student { public: Student(int xx){x=
下列程序的执行结果是______。
include＜iostream.h＞
class Student
{
public:
Student(int xx){x=xx;}
virtual float calcTuition( );
protected:
int x;
};
float Studertt::calcTuition( )
{
return float(x*x);
}
class GraduateStudent:public Student
{
public:
GraduateStudent(int xx):Student(xx){}
float calcTuition( );
};
float Graduatestudent::calcTuition( )
{
return float(x*2);
}
void main( )
{
Student s(20);
GraduateStudent gs(30);
cout＜＜s.calcTuition( )＜＜" "＜＜gs.calcTuition( )＜＜endl;
//计算学生s和研究生gs的学费
}
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