vector addition C++

/*program to do vector addition*/

#include<iostream.h>
#include<conio.h>

class VecAdd
{
	private : int a,b,c;   //coefficients of i,j,k
	public : void read();
			 void display();
			 VecAdd add(VecAdd);
};
void VecAdd :: read()
{
	cout<<"Enter coefficient of i: ";
	cin>>a;
	cout<<"Enter coefficient of j: ";
	cin>>b;
	cout<<"Enter coefficient of k: ";
	cin>>c;
	cout<<"\n";
}
void VecAdd :: display()
{
	cout<<a<<"i + "<<b<<"j + "<<c<<"k\n";
}
VecAdd VecAdd :: add(VecAdd x)
{
	VecAdd z;
	z.a=a+x.a;
	z.b=b+x.b;
	z.c=c+x.c;
	return z;
}
int main()
{
	VecAdd v1,v2,v3;
	clrscr();
	v1.read();
	v2.read();
	cout<<"Before Addition:\n";
	v1.display();
	v2.display();
	v3=v1.add(v2);
	cout<<"After Addition:\n";
	v3.display();
	getch();
	return 0;
}