circle类和table类派生roundtable类

来源：百度知道 编辑：UC知道 时间：2024/06/20 22:01:53
#include <iostream.h>
#define PAI 3.14
class table
{
public:
double GaoDu;
char *YanSe;
public:
virtual void display()=0;
};
class circle
{
public:
double BanJing;
public:
virtual void display()=0;
};
class roundtable : public table,public circle
{
public:
void iniroundtable(double G,double B,char *Y)
{
GaoDu=G;
BanJing=B;
YanSe=Y;
}
void display()
{
cout<<"Yuan Zhuo de GaoDu : "<<GaoDu<<endl;
cout<<"Yuan Zhuo de YanSe : "<<YanSe<<endl;
cout<<"Yuan Zhuo de MianJi : "<<PAI*BanJing*BanJing<<endl;
}
protected:
double GaoDu,BanJing;
char *YanSe;
};
int main()
{
double G,B;
char *Y;
cout<<"Shu Ru Yuan De BanJing :";
cin>>B;
cout<<"Shu

不能通过指针为字符串赋值吧。
看不懂你写这个程序的意图，既然用的继承，何必roundtable类又声明继承过来的成员呢？
分析你的目的，可将程序写成：
#include <iostream>
#include <string>
using namespace std;
#define PAI 3.14

class roundtable
{
public:
void iniroundtable(double G,double B,string Y)
{
GaoDu=G;
BanJing=B;
YanSe=Y;
}
void display()
{
cout<<"Yuan Zhuo de GaoDu : "<<GaoDu<<endl;
cout<<"Yuan Zhuo de YanSe : "<<YanSe<<endl;
cout<<"Yuan Zhuo de MianJi : "<<PAI*BanJing*BanJing<<endl;
}
protected:
double GaoDu,BanJing;
string YanSe;
};
int main()
{
double G,B;
string Y;
cout<<"Shu Ru Yuan De BanJing :";
cin>>B;
cout<<"Shu Ru Zhuo De GaoDu :";
cin>>G;
cout<<"Shu Ru Zhuo De YanSe :";
cin>