Question

Hi I need help doing this problem

*The program must re-prompt as long as invalid input is inserted

Implement a program that manages shapes. Implement a class named Shape with a virtual function area()which returns the double value. Implement three derived classes named Diamond, Oval, and Pentagon. Declare necessary properties in each including getter and setter function and a constructor that sets the values of these properties. Override the area() function in each by calculating the area using the defined properties in that class. Write a program that repeatedly shows the user a menu to create one of the three main shapes or to print the shapes created so far. If the user selects to create a new shape, the program prompts the user to enter the values for the size of the selected shape. The shape is then stored in an array*. If the user selects to print the current shapes, print the name and the total area of each shape to the console. Creating objects for testing all classes in the main function.

*The array must hold pointers to Shape objects. You may limit the size of the array to 10.

Answer 1

Note: Could you plz go through this code and let me know if u need any changes in this.Thank You
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#include <iostream>
#include <iomanip>
#include <ctime>
#include <cstdlib>
using namespace std;

class Shape
{
   private :
       string name;
       public :
           Shape(string n)
           {
               this->name=n;
           }
           virtual double area()=0;
               string getShape()
           {
               return name;
           }
};
class Diamond:public Shape
{
   private :
       double base;
       double height;
       public :
           Diamond(double b,double h,string name):Shape(name)
           {
               this->base=b;
               this->height=h;
           }
          
           double area()
           {
               return (base*height)/2;
           }
      
};

class Oval:public Shape
{
private :
   double a;
   double b;
  
public :  
Oval(double a,double b,string name):Shape(name)
{
this->a=a;
this->b=b;
   }
   double area()
   {
       return a*b*3.14159;
   }
  
};
class Pentagon:public Shape
{
   private :
       double s;
       double a;
      
       public :
           Pentagon(double s,double a,string name):Shape(name)
           {
               this->s=s;
               this->a=a;
           }
           double area()
           {
               return (5*(s*a))/2;
           }
};
int main()
{
int choice,cnt=0;
const int SIZE=10;
Shape* shapes[SIZE];
  
while(true)
{
cout<<"\n1.Oval"<<endl;
cout<<"2.Pentagon"<<endl;
cout<<"3.Diamond"<<endl;
cout<<"4.Display all Shapes"<<endl;
cout<<"5.Exit"<<endl;
cout<<"Enter Choice :";
cin>>choice;
if(cnt>=SIZE)
{
   cout<<"** Array is full **"<<endl;
   continue;
}
switch(choice)
{
   case 1:{
  
       double a,b;
       cout<<"Enter Minor Radius (a):";
       cin>>a;
       cout<<"Enter Major Radius (a):";
       cin>>b;
       Oval* o=new Oval(a,b,"Oval");
       shapes[cnt]=o;
       cnt++;
  
       continue;
   }
   case 2:{
       double s,a;
       cout<<"Enter the side length (s):";
       cin>>s;
       cout<<"Enter the length of apothem (a):";
       cin>>a;
       Pentagon* pen=new Pentagon(s,a,"Pentagon");
       shapes[cnt]=pen;
       cnt++;
       continue;
   }
   case 3:{
       double b,h;
       cout<<"Enter the length of base (b):";
       cin>>b;
       cout<<"Enter the height (h):";
       cin>>h;
      
       Diamond* d=new Diamond(b,h,"Diamond");
       shapes[cnt]=d;
       cnt++;
       continue;
   }
   case 4:{
       for(int i=0;i<cnt;i++)
       {
           cout<<"Shape Name :"<<shapes[i]->getShape()<<endl;
           cout<<"Area :"<<shapes[i]->area()<<endl;
           cout<<"------------------------------"<<endl;
       }
       continue;
   }
   case 5:{
      
       break;
   }
   default:{
       cout<<"** Invalid Choice **"<<endl;
       continue;
   }

}
   break;
}
  
return 0;
}

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Output:

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