Write• A C++ Program To Depict Concept Of Abstraction, Data Hiding, Encapsulation.

#include<math.h> 
 #include<iostream.h> 
 #include<conio.h> 
 #include<process.h> 
 class quadratic 
 { 
      private: 
      double a,b,c; 
      public: 
                   void read(); 
                   void funcroots(); 
 }; 
               void quadratic::read() 
         { 
               cout<<"Enter coffiecients of Quadratic Eq. a,b,c"; 
               cin>>a>>b>>c; 
         } 
              void quadratic::funcroots() 
        { 
             if(a==0) 
              { 
                    cout<<"\nEquations is not quadratic"; 
                    exit(0); 
             } 
          else 
          { 
                   double disc; 
                   disc=b*b-4 *a*c; 
                   if(disc<0) 
                      cout<<"\nRoots are Imaginary"; 
                   else if(disc==0) 
                          { 
                                 double x=-b/(2*a); 
                                 cout<<"\nRoots are Equal,x= u"<<x; 
                          } 
                   else 
                         { 
                                 double m,n,t; 
                                 t=sqrt(disc); 
                                 m=( -b+t)/(2*a); 
                                 n=(-b-t)/(2*a); 
                                 cout<<"\nRoots are Real and Unequal"<<endl; 
                                 cout<<"m="<<m<<endl; 
                                 cout<<"n="<<n; 
                         } 
            } 
     } 
              void main() 
         { 
                clrscr(); 
                quadratic q1 ; 
                q1.read(); 
                q1.funcroots(); 
                getch(); 
        }