oops assignment 5.txt

#include<iostream>
using namespace std;
class Shape
{
public:
double length,breadth;
//constructor to assign initial values to length and breadth
Shape()
{
length=0;
breadth=0;
}
//get_data() function to get values of length and breadth
void get_data()
{
cout<<"\nEnter height and base to compute are :";
cin>>length>>breadth;
}
//declaration of virtual function display_area()
virtual void display_area()=0;
};
//class triangle inheriting class Shape
class Triangle : public Shape
{
public:
//redefining function display_area()
void display_area()
{
cout<<"\nArea of Triangle = "<<(length*breadth)/2<<endl;
}
};
//class Rectangle inheriting class Shape
class Rectangle : public Shape
{
public:
void display_area()
{
cout<<"\nArea of Rectangle = "<<length*breadth<<endl;
}
};
int main()
{
Shape *s;
Triangle t;
Rectangle r;
int ch;
  while(1){
cout<<"1.Calculate area of triangle:-"<<endl;
cout<<"2.Calculate area of rectangle:-"<<endl;
cout<<"Enter your choice:-"<<endl;
cin>>ch;
switch(ch){
  case 1:
  s=&t;
s->get_data();
s->display_area();
  break;
  case 2:
  s=&r;
s->get_data();
s->display_area();
  break;
  default:
  cout<<"Invalid choice"<<endl;
  break;
}    
}
  return 0;
  }