Question

Write a C++ program for the instructions below. Please read the instructions carefully and make sure they are followed correctly.  

please put comment with code! and please do not just copy other solutions.

Instructions 1. Read instructions carefully! 2. Use C++ syntax only, C syntax will not be accepted. 3. Always use braces to define blocks. 4. Indent all lines within a block. Each block requires one more tab. 5. Organize your code well with proper formatting and a single statement per line 6. Always insert a space before and after each operator, e.g. ab ci not a-b+c; 7. Use meaningful variable names following conventions using camelCase 8. Comment your code to clarify your thoughts if needed but do NOT comment every single line of code! You may not use any library functions unless explicitly specified. You must always include 9. 10. Don't forget to uncomment entirely commented files before submission 11. Name each program probleml.cpp, problem2.cpp, etc. and upload each file to Canvas. 12. Never use goto statements or while (I) or while (true). Use a condition that eventually turns false. 13. Validate all input and re-prompt as long as an invalid value is entered! You don't need to validate the type. Shapes Problem 1 20 Points Implement a program that manages shapes. Implement a class named Shape with a virtual function area0 which returns the double value 0.0.Implement three derived classes named Rectangle, Square, and Circle. 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. The array must hold pointers to Shape objects. You may limit the size of the array to 10.

Answer 1

#include <iostream>
using namespace std;

class Shape //virtual base class
{
public:
virtual double Area() // virtual function Area()
{
   return 0.0;
}

};
class Circle : public Shape //inheritance
{
private:
double radius;
public:
Circle(double r) //constructor
{
radius =r;
}
double getRadius() //get methods
{
return radius;
}
double Area() //redefining Area() function
{
cout << "\nArea of circle :";
return (3.14*getRadius()*getRadius());
}
};
class Rectangle : public Shape //inheriting abstract base class Shape
{
private:
double length,width;
public:
Rectangle(double l,double w) //constructor to set values
{
length =l;
width = w;
}
double getLength() //get methods
{
return length;
}
double getWidth()
{
return width;
}

double Area() //redefining Area() function
{
cout << "\nArea of rectangle : ";
return (getLength()*getWidth());
}
};
class Square : public Shape //inheriting abstract base class
{
private:
double side;
public:
Square(double s) //constructor to set radius
{
side = s;
}
double getSide() //get method
{
return side;
}
double Area() //redefining virtual method
{
cout<<"\nArea of square :";
return (getSide()*getSide());
}
};

int main()
{

Shape *shape[10];
int option;
int i= 0;
double length,width,radius,side;

do
{
   cout<<"\n1. Create Rectangle ";
   cout<<"\n2. Create Circle ";
   cout<<"\n3. Create Square ";
   cout<<"\n4. Print the Shapes created so far : ";
   cout<<"\n5. Exit ";
  
   cout<<"\nEnter option <1,2,3,4 or 5> : ";
   cin>>option;
  
   switch(option)
   {
       case 1: cout<<"\nEnter the length and width of rectangle : ";
               cin>>length>>width;
               shape[i] = new Rectangle(length,width);
               i++;
              
               break;
      
      
       case 2:cout<<"\nEnter the radius of circle : ";
               cin>>radius;
               shape[i] = new Circle(radius);
               i++;
              
               break;
      
      
       case 3:cout<<"\nEnter the side of square : ";
               cin>>side;
               shape[i] = new Square(side);
               i++;
          
               break;
      
       case 4: for(int j=0;j<i;j++)
       cout<<shape[j]->Area();
       break;
      
       case 5: break;
      
      
       default : cout<<"\nInvalid option";
                   break;
   }
  
}while(option != 5);

return 0;
}

Output:

1. Create Rectangle 
2. Create Circle 
3. Create Square 
4. Print the Shapes created so far : 
5. Exit 
Enter option <1,2,3,4 or 5> : 1
Enter the length and width of rectangle : 6.5 4.9
1. Create Rectangle 
2. Create Circle 
3. Create Square 
4. Print the Shapes created so far : 
5. Exit 
Enter option <1,2,3,4 or 5> : 2
Enter the radius of circle : 4.5
1. Create Rectangle 
2. Create Circle 
3. Create Square 
4. Print the Shapes created so far : 
5. Exit 
Enter option <1,2,3,4 or 5> : 3
Enter the side of square : 6.0
1. Create Rectangle 
2. Create Circle 
3. Create Square 
4. Print the Shapes created so far : 
5. Exit 
Enter option <1,2,3,4 or 5> : 1
Enter the length and width of rectangle : 3.3 4.4
1. Create Rectangle 
2. Create Circle 
3. Create Square 
4. Print the Shapes created so far : 
5. Exit 
Enter option <1,2,3,4 or 5> : 4
Area of rectangle : 31.85
Area of circle :63.585
Area of square :36
Area of rectangle : 14.52
1. Create Rectangle 
2. Create Circle 
3. Create Square 
4. Print the Shapes created so far : 
5. Exit 
Enter option <1,2,3,4 or 5> : 5

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