C++多形状体积累加及总容积打印功能实现求助

• 每次循环都重新创建Volume类对象，之前计算的体积数据会被清空
• 类内只存储了单个形状的体积，没有对外暴露体积的读取方法，主函数无法获取数值做累加
• 存在拼写错误：switch分支中case 3调用的cylender()和类内定义的cylinder()名称不匹配
• return 0写在while(1)循环内部，程序第一次运行就会直接退出，无法实现多次计算累加的效果
• 缺少存储总体积的变量，也没有对应的打印逻辑
• 头文件iostream.h是C++98之前的过时写法，conio.h是非标准依赖，兼容性差

#include <iostream>
using namespace std;

class Volume
{
    float V;
public:
    void cube()
    {
        float a;
        cout << "Enter value of side" << endl;
        cin >> a;
        V = a * a * a;
    }
    void cuboid()
    {
        float l, b, h;
        cout << "Enter length,breadth & height of cuboid" << endl;
        cin >> l >> b >> h;
        V = l * b * h;
    }
    void cylinder()
    {
        float r, h;
        cout << "Enter radius & height of cylinder" << endl;
        cin >> r >> h;
        V = 3.14 * r * r * h;
    }
    void sphere()
    {
        float r;
        cout << "Enter radius of sphere" << endl;
        cin >> r;
        V = (4 * 3.14 * r * r * r) / 3;
    }
    void cone()
    {
        float r, h;
        cout << "Enter radius & height of cone" << endl;
        cin >> r >> h;
        V = (3.14 * r * r * h) / 3;
    }
    void display()
    {
        cout << "Current shape volume is = " << V << endl;
    }
    // 新增获取当前体积的方法
    float getV()
    {
        return V;
    }
};

int main()
{
    float total_volume = 0; // 存储总体积的变量
    Volume ob; // 把对象创建移到循环外，避免每次重置
    while(1){
        int ch;
        cout << "Select the shape for calculate volume" << endl << endl;
        cout << "Press 1 for select CUBE" << endl;
        cout << "Press 2 for select CUBOID" << endl;
        cout << "Press 3 for select CYLINDER" << endl;
        cout << "Press 4 for select SPHERE" << endl;
        cout << "Press 5 for select CONE" << endl;
        cout << "Press 0 to EXIT and show total volume" << endl << endl;
        cin >> ch;
        cout << endl;

        if(ch == 0) break; // 按0退出循环

        switch(ch)
        {
            case 1: ob.cube();break;
            case 2: ob.cuboid();break;
            case 3: ob.cylinder();break; // 修复拼写错误
            case 4: ob.sphere();break;
            case 5: ob.cone();break;
            default: cout << "Wrong input" << endl; continue; // 错误输入直接回到选择界面
        }

        ob.display();
        total_volume += ob.getV(); // 累加当前体积到总容积
        cout << "Current total volume of all shapes is = " << total_volume << endl << endl;
    }
    // 退出后打印最终总体积
    cout << "Final total volume of all shapes is = " << total_volume << endl;
    return 0;
}

• 新增了getV()公共方法，主函数可以读取单个形状的体积做累加
• 在主函数中定义了total_volume变量存储总体积，每次计算完单个形状就更新数值
• 修复了方法名拼写错误和return 0的位置错误
• 移除了非标准的conio.h依赖，改为按0直接退出的交互逻辑，兼容性更好
• 每次计算完都会显示当前总容积，退出时也会打印最终的累加结果

内容的提问来源于stack exchange，提问作者Amey Dubey