Problema se intoarce

void main()
{
arbore a;//arb binar de cautare/ordonat
cin>>a;
a+=1;
a+=4;
arbore b;
b+=5;
b+=6;
arbore c;
c=a+b;
if(c.inArbore(2))
cout<<"am gasit elementul\n";
a.getLeft().getRight() = 9;
cout<< c;
}