Exam CPP topic 2 question 148 discussion

What happens when you attempt to compile and run the following code?
#include <vector>
#include <iostream>
#include <algorithm>
#include <functional>
using namespace std;
class B { int val;
public:
B(int v=0):val(v){}
int getV() const {return val;}
operator int () const { return val;} };
template<class T>struct Out {
ostream & out;
Out(ostream & o): out(o){}
void operator() (const T & val ) { out<<val<<" "; } }; struct Add : public binary_function<B, B, B> {
B operator() (const B & a, const B & b) const {
return a+b; } };
int main() {
B t[]={1,2,3,4,5,6,7,8,9,10};
vector<B> v1(t, t+10);
vector<B> v2(10);
transform(v1.begin(), v1.end(), v2.begin(), bind1st(Add(), 1)); for_each(v2.rbegin(), v2.rend(), Out<B>(cout));cout<<endl; return 0;
}
Program outputs: