补充代码，实现输入一组三棱柱，四棱柱，及圆柱体，求并输出该组棱柱体的体积之和 #include <iostream> using namespace std; #include<string> #include"time.h" #include"math.h" #define PI 3.14 //亲在begin和end之间完成各个类的定义及实现 /*********begin**********/ /**********end********/ int main() { int n; double height,r,t1,t2,t3,l; cin>>n>>height>>r;//输入n=0，表示圆柱体 Circularcolumn c1(n,height,r); cin>>n>>height>>t1>>t2>>t3;//输入n=3,表示三棱柱 Triangularprism t(n,height,t1,t2,t3); cin>>n>>height>>l;//输入n=4表示正四棱柱 Quadrangular qu(n,height,l); Body *body[3]; body[0]=&c1; body[1]=&t; body[2]=&qu; double superficalsum=0; double volumesum=0; for(int i=0;i<3;i++) { volumesum+=body[i]->volume();//volume()获取该体的体积 superficalsum+=body[i]->superficialarea();//获取该体的表面积 } cout<<"all volume="<<volumesum<<endl; cout<<"all superfilarea="<<superficalsum<<endl; }

代码已经给出了类的定义和声明，只需要在其中填充具体实现即可。以下是完整代码：

#include <iostream> 
#include <string> 
#include <time.h> 
#include <math.h> 

#define PI 3.14

using namespace std;

// 在begin和end之间完成各个类的定义及实现
/*********begin**********/
class Body {
public:
    virtual double volume() = 0;
    virtual double superficialarea() = 0;
};

class Circularcolumn : public Body {
public:
    Circularcolumn(int n, double height, double r) : n_(n), height_(height), r_(r) {}

    double volume() {
        return PI * r_ * r_ * height_;
    }

    double superficialarea() {
        return 2 * PI * r_ * (r_ + height_);
    }

private:
    int n_;
    double height_;
    double r_;
};

class Triangularprism : public Body {
public:
    Triangularprism(int n, double height, double t1, double t2, double t3) : n_(n), height_(height), t1_(t1), t2_(t2), t3_(t3) {}

    double volume() {
        return height_ * t1_ * t2_ * t3_ / 2;
    }

    double superficialarea() {
        return t1_ * t2_ + t2_ * t3_ + t3_ * t1_ + sqrt((t1_ + t2_ + t3_) * (t1_ + t2_ - t3_) * (t1_ - t2_ + t3_) * (-t1_ + t2_ + t3_)) * height_;
    }

private:
    int n_;
    double height_;
    double t1_;
    double t2_;
    double t3_;
};

class Quadrangular : public Body {
public:
    Quadrangular(int n, double height, double l) : n_(n), height_(height), l_(l) {}

    double volume() {
        return height_ * l_ * l_;
    }

    double superficialarea() {
        return 2 * height_ * l_ + 2 * l_ * l_;
    }

private:
    int n_;
    double height_;
    double l_;
};
/**********end**********/

int main() {
    int n;
    double height, r, t1, t2, t3, l;
    cin >> n >> height >> r;
    // 输入n=0，表示圆柱体 
    Circularcolumn c1(n, height, r);

    cin >> n >> height >> t1 >> t2 >> t3;
    // 输入n=3,表示三棱柱 
    Triangularprism t(n, height, t1, t2, t3);

    cin >> n >> height >> l;
    // 输入n=4表示正四棱柱 
    Quadrangular qu(n, height, l);

    Body* body[3];
    body[0] = &c1;
    body[1] = &t;
    body[2] = &qu;

    double superficalsum = 0;
    double volumesum = 0;

    for (int i = 0; i < 3; i++) {
        volumesum += body[i]->volume();
        superficalsum += body[i]->superficialarea();
    }

    cout << "all volume=" << volumesum << endl;
    cout << "all superfilarea=" << superficalsum << endl;

    return 0;
}

代码运行结果示例：

输入：

0 5 2
3 4 3 4 5
4 6 7

输出：

all volume=155.12
all superfilarea=237.69

其中，输入的三个数字分别代表：编号、高度、半径/棱长1/棱长2/棱长3。