问题描述

用C++编写程序，用来计算柱体体积和表面积

要求必须有圆柱和四棱柱的计算，可以选作三棱柱
谢谢！！！！！

解决方案

 #include <iostream>
#include <cmath>

using namespace std;

double const PI = 3.14159265358979;

class Point {
private :
    double x;
    double y;
public :
    Point(double nx = 0, double ny = 0) : x(nx),y(ny) {}
    double Getx() const { return x; }
    double Gety() const { return y; }
    void Setx(double nx) { x = nx; }
    void Sety(double ny) { y = ny; }
    friend double Disdance(const Point &a, const Point &b) {
        double mt1 = (a.x - b.x) * (a.x - b.x);
        double mt2 = (a.y - b.y) * (a.y - b.y);
        return sqrt(mt1 + mt2);
    }
    void Show() const {
        cout << "(" << x << "," << y << ")";
    }
};

class Orthogon {
private :
    double length;  // 矩形的长度
    double width;   // 矩形的宽度
public :
    Orthogon(double len = 0, double w = 0) : length(len),width(w) {}
    void Set(double len, double w) {length = len; width = w; }
    double GetGirth() const { return 2*(length + width); }
    double GetBasalArea() const { return length * width; }
    void Show() const {
        cout << "矩形底边长: " << length << endl;
        cout << "矩形底边宽: " << width << endl;
        cout << "矩形底面周长: " << GetGirth() << endl;
        cout << "矩形底面面积: " << GetBasalArea() << endl;
    }
};

class Circle {
private :
    Point centre;
    double radius;
public :
    Circle() { centre = Point(0,0); radius = 0; }
    Circle(const Point ?er,double r = 0) : centre(center),radius(r) {}
    void Set(const Point &pcen, double r) {centre = pcen; radius = r; }
    double GetGirth() const { return 2 * PI * radius; }
    double GetBasalArea() const { return PI * radius * radius; }
    void Show() const {
        cout << "圆心坐标: "; centre.Show();cout << endl;
        cout << "半径: " << radius << endl;
        cout << "矩形底面周长: " << GetGirth() << endl;
        cout << "矩形底面面积: " << GetBasalArea() << endl;
    }
};

class Triangle {
private :
    Point A;
    Point B;
    Point C;
public :
    Triangle() { A = 0; B = 0; C = 0; }
    Triangle(const Point &pa, const Point &pb, const Point &pc) {
        A = pa; B = pb; C = pc;
    }
    void Set(const Point &pa, const Point &pb, const Point &pc) {
        A = pa; B = pb; C = pc;
    }
    double GetAB() const { return Disdance(A,B); }
    double GetBC() const { return Disdance(B,C); }
    double GetCA() const { return Disdance(C,A); }
    double GetGirth() const { return GetAB() + GetBC() + GetCA(); }
    double GetBasalArea() const {
        double a,b,c,p;
        a = GetBC(); b = GetCA(); c = GetAB();
        p = (a + b + c) / 2.0;
        return sqrt(p * (p - a) * (p - b) * (p - c));
    }
    void Show() const {
        cout << "顶点A: ";A.Show();cout << ", ";
        cout << "顶点B: ";B.Show();cout << ", ";
        cout << "顶点C: ";C.Show();cout << endl;
        cout << "边长: " << GetAB() << ", " << GetBC() << ", " << GetCA() << endl;
        cout << "周长: " << GetGirth() << endl;
        cout << "面积: " << GetBasalArea() << endl;
    }
};

template<typename Type>
class Podetium {
private :
    Type base;
    double high;
public :
    Podetium(const Type &bs, double h) : base(bs),high(h) {}
    double GetVolume() const { return high * base.GetBasalArea(); }
    double GetSurfaceArea() const {
        return base.GetGirth() * high + 2 * base.GetBasalArea();
    }
    void Show() const {
        base.Show();
        cout << "柱体高: " << high << endl;
        cout << "柱体表面积: " << GetSurfaceArea() << endl;
        cout << "柱体体积: " << GetVolume() << endl;
    }
};

int main() {
    Point center(2,3); // 圆心坐标
    Point po[3]; // 三角形顶点
    Orthogon orth; // 声明矩形变量
    Circle cle;    // 声明圆变量
    Triangle trg;  // 声明三角形变量
    double x,y,len,w,r,h;
    cout << "圆柱的半径:"; cin >> r;
    cout << "圆柱的高:"; cin >> h;
    cle.Set(center,r); // 构造圆
    Podetium<Circle> pdtc(cle,h); // 构造圆柱体
    pdtc.Show(); // 显示圆柱信息
    cout << "长方体底边长:"; cin >> len;
    cout << "长方体底边宽:"; cin >> w;
    cout << "长方体的高:"; cin >> h;
    orth.Set(len,w);
    Podetium<Orthogon> pdto(orth,h);
    pdto.Show();
    for(char c = 'A'; c <= 'C'; ++c) {
        cout << "三棱柱 " << c << " 点坐标:";
        cin >> x >> y;
        po[c - 'A'].Setx(x);
        po[c - 'A'].Sety(y);
    }
    cout << "三棱柱的高:";
    cin >> h;
    trg.Set(po[0],po[1],po[2]);
    Podetium<Triangle> pdtt(trg,h);
    pdtt.Show();
    return 0;
}

解决方案二：

计算四棱柱的表面积与体积
计算长方柱的表面积和体积
圆的表面积和体积的计算