求助C++编程题，急

2024-12-16 22:40:28

推荐回答（2个）

回答1：

#include "string.h"

typedef enum
{
MATH = 0,
ENGLIST,
POLITICS,
SUBJECT_NUM
}SUBJECT;

const int NAME_SIZE = 20;

class Person
{
public:
Person(int iId,int iAge,char* pcName,float *fScore)
{
if(iId > 0) // Id合法性判断
{
id = iId;
}
if(iAge > 0) //iAge合法性判断
{
age = iAge;
}
if(pcName)
{
strcpy(name,pcName);
}
if (fScore)
{
for (int i=MATH;i {
score[i] = fScore[i];
}
}

};
~Person(){};
virtual void Display()
{
printf("The Student information : id : %d \n \
age : %d \n \
name: %s \n \
Math : %f \n \
ENGLIST : %f\n \
Politics : %f: " , \
id,age,name,score[MATH],score[ENGLIST],score[POLITICS]);

};
private:
int id;// 学号。
int age;//: 年龄。
char name[NAME_SIZE];//: 姓名
float score[SUBJECT_NUM];// 数学/英语/政治的成绩

};

class Employee : public Person
{
public:
Employee(int iId,int iAge,char* pcName,float *fScore,float fwage,char clevel) \
: Person(iId,iAge,pcName,fScore)
{

wage = fwage;
level = clevel;
};
~Employee(){};
virtual void Display()
{
Person::Display();
printf("The Employee wage : %f",wage*(1+1.0/level));
}

private :
float wage ; // 工资。
char level ; // 工种等级
};

int main(int argc, char* argv[])
{

float fscore[3]={100.0,90.0,80.5};
Person *pPerson = new Person(123,456,"PersonName",fscore);
Employee *pEmployee = new Employee(13,46,"EmployeeName",fscore,1234.5,2);
if (!pPerson || !pEmployee)
{
return 0;
}
Person *pp;
pp=pPerson;
pp->Display();
pp=pEmployee;
pp->Display();
if (pPerson || pEmployee)
{
delete pPerson;
delete pEmployee;
}
return 0;
}

回答2：

#include
using namespace std;

class Person
{
protected:
int id;
int age;
char name[20];
float score[3];
public:
Person()
{
id=age=0;
}
Person(int d,int a,char *na,float*sc)
{
id=d;age=a;
strcpy(name,na);
score[0]=sc[0];score[1]=sc[1];score[2]=sc[2];
}
virtual void Display()
{
cout< cout< cout< for(int i=0;i<3;i++)cout< }
};
class Employee:public Person
{
float wage;
char level;
public:
Employee(int d,int a,char *na,float*sc,float wa,char le):Person(d,a,na,sc)
{
wage=wa;
level=le;
}
void Display()
{
cout< cout< cout< for(int i=0;i<3;i++)cout< cout< cout< }
};

void main()
{

float sc[3]={5,2,7.1};
Person p1(123,456,"myname",sc);
Person *pp;
Employee p2(13,46,"name",sc,2394.2,2);
pp=&p1;
pp->Display();
pp=&p2;
pp->Display();
}

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