Question 9
What happens when you attempt to compile and run the following code?
#include <deque>
#include <iostream>
#include <algorithm>
using namespace std;
class B { int val;
public:
B(int v):val(v)
int getV() const {return val;} bool operator < (const B & v) const { return val<v.val;} };
ostream & operator <<(ostream & out, const B & v) { out<<v.getV(); return out;}
template<class T>struct Out {
ostream & out;
Out(ostream & o): out(o)
void operator() (const T & val ) { out<<val<<" "; } };
int main() {
int t[]={8, 10, 5, 1, 4, 6, 2, 7, 9, 3};
deque<B> d1(t, t+10);
sort(d1.begin(), d1.end());
deque<B>::iterator it = upper_bound(d1.begin(), d1.end(), B(4));
for_each(it, d1.end(), Out<B>(cout)); cout<<endl;
return 0;
}
Program outputs:
Correct answer: A