计算机二级《C++》上级考试试题及答案2017
一、基本操作题
1请使用VC6或使用【答题】菜单打开考生文件夹projl下的工程projl。程序中位于每个“//ERROR****found料****之后的一行语句有错误,请加以改正。改正后程序的输出结果应为:
Name:Smith Age:21 ID:99999 CourseNum:12
Record:970
注意:只修改每个“//ERROR****found****”下的那一行,不要改动程序中的其他内容。
#include
using namespace std;
class Studentlnfo
{
protected:
//ERROR********************found****************
char Name;
int Age;
int ID:
int CourseNum;
float Record;
public:
Studentlnfo(char*name,int Age,int ID,int coumeNum,float record);
//ERROR ********************found********************
void~Studentlnfo(){}
float AverageRecord(){
return Record/CourseNum;
}
void show()const{
cout<<”Name:”<
<<”CourseNum:”<
}
};
//ERROR ******************found**************
StudentInfo StudentInfo(char*Name,int Age,int ID,int CourseNum,float Record)
{
Name=name;
Age=age;
this一>ID=ID:
CourseNum=courseNum:
Record=record;
}
int main()
{
Studentlnfo st(’’Smith”,21,99999,12,970);
st.show();
return 0;
}
参考解析:
(1)char*Name;
(2)~Studentlnfo(){}
(3)Studentlnf0::Studentlnfo(char*name,int age,,int ID,int eourseNum,float record)
二、简单应用题
2请使用VC6或使用【答题】菜单打开考生文件夹proj2下的工程proj2,其中定义了vehiele类,并派生出motorcar类和bicycle类。然后以motorcar和bicycle作为基类,再派生出motorcycle类。要求将Vehicle作为虚基类,避免二义性问题。请在程序中的横线处填写适当的代码并删除横线,以实现上述类定义。此程序的正确输出结果应为:
80
150
100
1
注意:只能在横线处填写适当的.代码,不要改动程序中的其他内容,也不要删除或移动“//****found****”。
#include
class vehicle
{
private:
int MaxSpeed;
int Weight;
public:
//*************found************
vehicle(int maxspeed,int weight):——
~vehicle(){};
int getMaxSpeed(){return MaxSpeed;}
int getWeight(){retum Weight;}
};
//****************found************
class bicycle:——public vehicle
{
private:
int Height;
public:
bicycle(int maxspeed,int weight,int height):vehicle(maxspeed,weight),Height(height){}
int getHeight(){retum Height;};
};
//*******************found**************
class motorcar:——public vehicle
{
private:
int SeatNum;
public:
motorcar(int maxspeed。int weight,int seatnum):vehicle(maxspeed,weight),SeatNum(seatnum){}
int getSeatNum(){return SeatNum;};
};
//*****************found***************
class motorcycle:——
{
public:
motorcycle(int maxspeed,int weight,int height):vehicle(maxspeed,weight),bicycle(maxspeed,weight,
height),motorcar(maxspeed,weight,1){}
};
void main()
{
motorcycle a(80,150,100);
cout<
cout<
cout<
cout<
}
参考解析:
(1)MaxSpeed(maxspeed),Weight(weight){f;
(2)virtual
(3)virtua1
(4)public bicycle,public motorcar