Arrays 需要使用类显示随机数生成器选项并输出到文件的帮助吗 我正在使用类为C++类分配任务。我一直坚持使用随机生成器显示每个类的正确输出。我得到的只是立方体和0。赋值的目的是为圆、正方形和立方体创建一个类，并在带有循环的数组中使用随机数生成器来显示选项

最后，我必须要求用户选择1。打印结果或2。输入文件名并保存到输出文件中。即使经过研究，我也不知道该怎么做

这是我的代码和输出：

const double PI = 2.0 * asin(1.0);

class Geometry {
public: 
 Geometry();
 void printColor();
 //void color(string); 
 virtual void calArea();
// virtual string calAreaPrint();
 double area, length;
 string color, shape;
};

Geometry::Geometry() {
 color = "blue"; //Default values set
 area = 0;
 length = 0;
 shape = "unknown";
}

void Geometry::printColor() { // Created function printColor with color display.
 cout << "The color is: " << color << endl;
}

void Geometry::calArea() { // Virtual void prints area 0 and shape unknown.
 cout << "Area: " << area << endl;
 cout << "The shape is: " << shape << endl;
}

class Circle : public Geometry {
private:
 double radius;
 string shape;
public:
 Circle();// constructor and default set to 5
 void calcArea();

 Circle::Circle() {
     radius = 5.0;
     shape = "circle";
 }
 void Circle::calcArea() {
     area= (radius * radius *PI);
     cout << "The area of the circle is: " << area <<
     "with a radius of: " << radius << endl;
 }

 class Square : public Geometry {
 private:
     double length; 
     string shape;
 public: 
     Square();
    void calcArea();
 };
     Square::Square() {
         length = 5.3;
         shape = "Square";
         area = 0;
     }
     void Square::calcArea() {
        area= (length * length);
        cout << "The area of the square is: " << area <<
            "with a length and width of: " << length << endl;
     }

      class Cube : public Geometry {
       private:
         double length, area; 
       public:
         Cube();
         void calcArea();
 };
     Cube::Cube(){ // Set the length of my choice.
         length = 2;
         area = 0;
         shape = "Cube";
     }
    void Cube::calcArea() {
        area=length * length * 6;
        cout << "The surface area of the " << shape << " is " << area <<
         "with side size of: " << length << endl;
     }

int main()
{
 Geometry* array[10];
 for (int i = 0; i < 10; i++) {

     int choice = 1 + rand() % 3;

     if (choice == 1) {
         array[i] = new Circle();
     }
     else if (choice == 2) {
         array[i] = new Square();
     }
     else if (choice == 3) {
         array[i] = new Cube();
     }
 }
 for (int i = 0; i < 10; i++) {
     array[i]->calArea();
 }

 return 0;
 ```

常数双PI=2.0*asin（1.0）；
类几何{
公众：
几何（）；
void printColor（）；
//空颜色（字符串）；
虚空卡拉雷亚（）；
//虚拟字符串calAreaPrint（）；
双面积，长度；
线的颜色、形状；
};
几何体：：几何体（）{
color=“blue”；//设置默认值
面积=0；
长度=0；
shape=“未知”；
}
void Geometry:：printColor（）{//创建了带有颜色显示的函数printColor。
库特