Visual Studio调试问题：仅显示Sphere模块，无法输入其他选项

我编写的C++程序用于让用户选择形状，输入参数计算其表面积和体积，但调试时仅显示Sphere（球体）部分，无法输入其他选项。以下是我的代码：

#include <iostream>
#include <iomanip>
#include <cmath>
#include <string>
using namespace std;


int main()
{
    //Text
    cout << "\nHello there! This program will help   " << endl;
    cout << "\ncalulate the surface areas and the    " << endl;
    cout << "\nvolumes of the displayed shapes below." << endl;
    cout << endl;

    cout << "----------------------------------------" << endl;
    cout << " A: Sphere          " << endl;
    cout << " B: Cube            " << endl;
    cout << " C: Dodecahedron    " << endl;
    cout << " D: Cylinder        " << endl;
    cout << " E: Cone            " << endl;
    cout << "----------------------------------------" << endl;
    cout << endl;

//Variables

    double Sphere = 0.0,
        Cube = 0.0,
        Dodecahedron = 0.0,
        Cylinder = 0.0,
        Cone = 0.0;


     float A = (Sphere),
         B = (Cube),
         C = (Dodecahedron),
         D = (Cylinder),
         E = (Cone);


    //Question
    // enter code here
    cout << "Please select one of the following..." << endl;
    cin >> A;
    cin >> B;
    cin >> C;
    cin >> D;
    cin >> E;
    {
        //Sphere

        int SphereRadius = 0.0;

        double pi = 3.1415926535898;

        double SphereSA = (4 * pi * (SphereRadius * SphereRadius));

        double SphereV = ((int(4 / 3)) * (pi * (SphereRadius * SphereRadius * SphereRadius)));

        if (Sphere);

        cout << "\nIn order to find the surface area and " << endl;
        cout << "\nvolume we will need a radius.         " << endl;
        cout << endl;

        cout << "\nPlease input a positive number for the radius: " << endl;
        cin >> SphereRadius;
        cout << endl;

        cout << "\nWith the given radius... " << endl;
        cout << endl;
        cout << "\nSurface area will be: " << setprecision(2) << SphereSA << endl;
        cout << endl;
        cout << "\nVolume will be: " << setprecision(2) << SphereRadius << endl;

    }
    {
        //Cube

        int CubeSide = 0.0;

        double CubeSA = (6 * (CubeSide * CubeSide));

        double CubeV = (CubeSide * CubeSide * CubeSide);

        if (Cube);

        cout << "\nIn order to find the surface area and " << endl;
        cout << "\nvolume we will need a side length.         " << endl;
        cout << endl;

        cout << "\nPlease input a positive number for the side length: " << endl;
        cin >> CubeSide;
        cout << endl;

        cout << "\nWith the given side length... " << endl;
        cout << endl;
        cout << "\nSurface area will be: " << setprecision(2) << CubeSA << endl;
        cout << endl;
        cout << "\nVolume will be: " << setprecision(2) << CubeV << endl;
        cout << endl;

    }
    {
        //Cone

        int ConeH = 0.0;

        double ConeR = 0.0;

        double ConeSA = (pi * ConeR * (ConeR + sqrt((ConeH * ConeH) + (ConeR * ConeR))));

        double ConeV = (pi * ((ConeR * ConeR) * (ConeH / 3)));

        if (Cone);

        cout << "\nIn order to find the surface area and " << endl;
        cout << "\nvolume we will need a radius and a height.         " << endl;
        cout << endl;

        cout << "\nPlease input a positive number for the radius: " << endl;
        cin >> ConeR;
        cout << endl;
        cout << "\nPlease input a positive number for the height: " << endl;
        cin >> ConeH;
        cout << endl;

        cout << "\nWith the given side length... " << endl;
        cout << endl;
        cout << "\nSurface area will be: " << setprecision(2) << ConeSA << endl;
        cout << endl;
        cout << "\nVolume will be: " << setprecision(2) << ConeV << endl;
        cout << endl;

    }
    {
        //Dodecahedron 

        int DodeEdge = 0.0;

        double DodeSA = (3 * (sqrt(25 + 10 * sqrt(5) * DodeEdge)));

        double DodeV = (DodeEdge * ((15 + (7 * sqrt(5)) / 4)));

        if (Dodecahedron);

        cout << "\nIn order to find the surface area and " << endl;
        cout << "\nvolume we will need to have an edge.         " << endl;
        cout << endl;

        cout << "\nPlease input a positive number for the edge: " << endl;
        cin >> DodeEdge;
        string DodeEdge;

        cout << "\nWith the given edge length... " << endl;
        cout << endl;
        cout << "\nSurface area will be: " << setprecision(2) << DodeSA << endl;
        cout << endl;
        cout << "\nVolume will be: " << setprecision(2) << DodeV << endl;
        cout << endl;

    }
    {
        //Cylinder

        int CylinderH = 0.0;

        int CylinderR = 0.0;

        double CylinderSA = ((2 * CylinderR * pi * CylinderH) + (2 * pi * (CylinderR * CylinderR)));

        double CylinderV = (pi * (CylinderR * CylinderR) * CylinderH);

        if (Cylinder);

        cout << "\nIn order to find the surface area and " << endl;
        cout << "\nvolume we will need to have a radius and a height.         " << endl;
        cout << endl;

        cout << "\nPlease input a positive number for the radius: " << endl;
        cin >> CylinderR;
        cout << endl;
        cout << "\nPlease input a positive number for the height: " << endl;
        cin >> CylinderH;
        cout << endl;


        cout << "\nWith the given radius and height... " << endl;
        cout << endl;
        cout << "\nSurface area will be: " << setprecision(2) << CylinderSA << endl;
        cout << endl;
        cout << "\nVolume will be: " << setprecision(2) << CylinderV << endl;
        cout << endl;

    }


    return 0;
    
}

我是编程新手，这是考试相关内容，希望得到错误点提示而非完整代码，非常感谢！

错误点提示 #

• 选项输入逻辑错误：当前代码要求用户连续输入5个float值（cin >> A; cin >> B; ...），但实际只需要读取一个代表形状选项的字符（比如A/B/C/D/E），应该用char类型变量接收单个选项输入。
• 条件判断完全失效：所有if (变量);语句后的分号会让if成为空语句，后续代码不受条件约束会全部执行；且判断的变量初始值都是0，逻辑完全不成立，应该根据用户选择的选项来分支执行对应形状的代码。
• 变量类型与用途不匹配：用float类型的A、B等存储选项是错误的，选项是字符类型，应该定义char choice;来接收用户输入。
• 计算逻辑提前执行：所有形状的表面积、体积计算都是在用户输入参数前完成的，使用的是变量初始值（比如SphereRadius初始为0），应该在用户输入参数后再进行计算。
• 变量重复定义：Dodecahedron部分中，已经定义过int DodeEdge，又重复定义string DodeEdge，这会导致编译错误。
• 常量作用域问题：pi仅在Sphere的代码块内定义，其他形状（如Cone、Cylinder）使用pi会出现未定义的编译错误，应该将pi定义在main函数开头或全局作用域。
• 输出内容错误：Sphere部分输出体积时，错误地输出了SphereRadius而非计算好的SphereV。
• 代码块无分支约束：每个形状的代码块只是用{}包裹，但没有对应的条件判断，程序会依次执行所有形状的代码流程，这就是为什么会直接进入球体输入环节的原因。

内容的提问来源于stack exchange，提问作者Stephen Corvino