计算几种不同的三维图形的表面积和体积。这里 定义一个抽象类CShape，将其成员函数显示基本图形信息函数DispAttr0、计算表面积函数SArea0和计算体积函数volumeQ定义为纯虛函数。根据此抽象类 派生出球体、正方体、 •长方体和圆柱体，并分别重新 实现基类中的纯虛函数来显示输出计算结果。c++

好的，这是根据您的要求修改后的代码：

#include <iostream>
using namespace std;

const double PI = 3.14159265358979323846;

class CShape {
public:
    virtual void DispAttr0() = 0;
    virtual double SArea0() = 0;
    virtual double volumeQ() = 0;
};

class CCube : public CShape {
public:
    CCube(double a) : m_a(a) {}
    void DispAttr0() { cout << "正方体：边长 = " << m_a << endl; }
    double SArea0() { return 6 * m_a * m_a; }
    double volumeQ() { return m_a * m_a * m_a; }
private:
    double m_a;
};

class CSphere : public CShape {
public:
    CSphere(double r) : m_r(r) {}
    void DispAttr0() { cout << "球体：半径 = " << m_r << endl; }
    double SArea0() { return 4 * PI * m_r * m_r; }
    double volumeQ() { return 4.0 / 3.0 * PI * m_r * m_r * m_r; }
private:
    double m_r;
};

class CRectangle : public CShape {
public:
    CRectangle(double a, double b, double c) : m_a(a), m_b(b), m_c(c) {}
    void DispAttr0() { cout << "长方体：长 = " << m_a << ", 宽 = " << m_b << ", 高 = " << m_c << endl; }
    double SArea0() { return 2 * (m_a * m_b + m_b * m_c + m_c * m_a); }
    double volumeQ() { return m_a * m_b * m_c; }
private:
    double m_a;
    double m_b;
    double m_c;
};

class CCylinder : public CShape {
public:
    CCylinder(double r, double h) : m_r(r), m_h(h) {}
    void DispAttr0() { cout << "圆柱体：底面半径 = " << m_r << ", 高 = " << m_h << endl; }
    double SArea0() { return 2 * PI * m_r * m_h + 2 * PI * m_r * m_r; }
    double volumeQ() { return PI * m_r * m_r * m_h; }
private:
    double m_r;
    double m_h;
};

int main() {
    CCube cube(2);
    cube.DispAttr0();
    cout << "表面积 = " << cube.SArea0() << endl;
    cout << "体积 = " << cube.volumeQ() << endl;

    CSphere sphere(3);
    sphere.DispAttr0();
    cout << "表面积 = " << sphere.SArea0() << endl;
    cout << "体积 = " << sphere.volumeQ() << endl;

    CRectangle rectangle(2, 3, 4);
    rectangle.DispAttr0();
    cout << "表面积 = " << rectangle.SArea0() << endl;
    cout << "体积 = " << rectangle.volumeQ() << endl;

    CCylinder cylinder(2, 4);
    cylinder.DispAttr0();
    cout << "表面积 = " << cylinder.SArea0() << endl;
    cout << "体积 = " << cylinder.volumeQ() << endl;

    return 0;
}

这里重新定义了抽象类CShape，并分别派生出了正方体、球体、长方体和圆柱体这四个类。这些类实现了基本图形信息、表面积和体积的计算方法。在主函数中，我们分别创建了一个正方体、球体、长方体和圆柱体的对象，并调用它们的成员函数来显示基本图形信息、计算表面积和体积，并输出计算结果。