检查代码错误#include<iostream> using namespace std; class Shape { protected: int r; public: Shape(int r); virtual double surfaceArea()=0; virtual double volume()=0; }; Shpe::Shape(int r):r(r){ } class Ball:public Shape{ public: Ball(int r); double surfaceArea()override; double volume ()override; }; Ball::Ball(int r):Shape(r){ } double Ball::surfaceArea(){ return 4*3.14*r*r; } double Ball::surfaceArea(){ return 4.0/3*3.14*r*r*r; } class Cylinder:public Shape{ private: int height; public: Cylinder(int r,int height); double surfaceArea()override; double volume()override; }; Cylinder::Cylinder(int r,int height):Shape(r),height(height){ } double Cylinder::surfaceArea(){ return 2*3.14*r*r+height*2*3.14*r; } double Cylinder::volume(){ return 3.14*r*r*height; } int main(int argc,char*argv[]){ return 0; }

在 Shape 类的构造函数的定义中，类名拼写错误，应该是 Shape 而不是 Shpe。

在 Ball 类中，surfaceArea 函数定义了两次，应该将第二个定义修改为 volume 函数。

下面是修改后的程序：

#include <iostream>
using namespace std;

class Shape {
protected:
    int r;
public:
    Shape(int r);
    virtual double surfaceArea() = 0;
    virtual double volume() = 0;
};

Shape::Shape(int r) : r(r) {}

class Ball : public Shape {
public:
    Ball(int r);
    double surfaceArea() override;
    double volume() override;
};

Ball::Ball(int r) : Shape(r) {}

double Ball::surfaceArea() {
    return 4 * 3.14 * r * r;
}

double Ball::volume() {
    return 4.0 / 3 * 3.14 * r * r * r;
}

class Cylinder : public Shape {
private:
    int height;
public:
    Cylinder(int r, int height);
    double surfaceArea() override;
    double volume() override;
};

Cylinder::Cylinder(int r, int height) : Shape(r), height(height) {}

double Cylinder::surfaceArea() {
    return 2 * 3.14 * r * r + height * 2 * 3.14 * r;
}

double Cylinder::volume() {
    return 3.14 * r * r * height;
}

int main(int argc, char* argv[]) {
    return 0;
}