Program of function overloading:

class vector{

                private :

                int v[3];

                public:

                /*friend istream & operator >> (istream & ,vector &);*/ //overloading the

                                                                                                                //insertion operator

                                                                                                                // for the vector type object

                friend vector operator * (vector,int);

                friend vector operator * (int ,vector);

                vector()  dummy constructor

                {

                }

       vector (int *p);

                 void show();

                 }; // class termination

                /* istream & operator >>(istrream &din ,vector & b )

                                {

                                for( int i=0;i<3;i++)

                                                din >> b.v[i];

                                  return din;//for cascading

                                }*/

       vector operator *(vector a,int b)//function overloading

                                {          vector c;

                                                for(int i=0;i<3;i++)

                                                                c.v[i]=b*a.v[i];

                                  return c;

                                  }

                vector operator *(int a,vector b)

                                {

                                vector c;

                                                for(int i=0;i<3;i++)

                                                                c.v[i]=a*b.v[i];

                                  return c;

                       }

      vector:: vector( int *p)

      {

                                for(int i=0;i<3;i++)

                                                v[i]=p[i];

                }

                void vector ::show()

                {

                                 for (int i=0;i<3;i++)

                                                cout << "\n"<

                                 }

                void main()

                {

                int t[]={ 1,2,3};

                vector a,b(t),c;

                clrscr();

                a=b*10;

                c=20*b;

                b.show();

                a.show();

                c.show();

                getch();

       }