如何在主函数中用矩形类定义矩形对象 rct，最后显示矩形的长、宽与面积？

定义描述矩形的类 Rectangle，其私有数据成员为矩形的长(Length)与宽(Width)，其公有函数成员为构造函数、计算矩形面积的函数 Area()与输出矩形长、宽和面积的函数 Display()。在主函数中用矩形类定义矩形对象 rct，并赋初始值(40,30)，最后显示矩形的长、宽与面积

#include <iostream>

class Rectangle {
 private:
  int length_;
  int width_;

 public:
  // Constructor
  Rectangle(int length, int width) : length_(length), width_(width) {}

  // Member function to calculate the area of the rectangle
  int Area() { return length_ * width_; }

  // Member function to display the length, width, and area of the rectangle
  void Display() {
    std::cout << "Length: " << length_ << std::endl;
    std::cout << "Width: " << width_ << std::endl;
    std::cout << "Area: " << Area() << std::endl;
  }
};

int main() {
  // Create a rectangle object with length 40 and width 30
  Rectangle rct(40, 30);

  // Display the length, width, and area of the rectangle
  rct.Display();

  return 0;
}

仅供参考，望采纳，谢谢。

#include <iostream>
using namespace std;

class Rectangle
{
private:
    float Length, Width;

public:
    Rectangle(float l = 0, float w = 0) : Length(l), Width(w){};
    float Area() { return Length * Width; };
    void Display()
    {
        cout << Length << " " << Width << " " << Area() << endl;
    };
};

int main()
{
    Rectangle rct(40, 30);
    rct.Display();
    return 0;
}