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#include <iostream>
using namespace std;
class Element {
private:
int atomic_number;
public:
Element(int atomic_number) :
atomic_number(atomic_number) {}
int get_atomic_number() const {
return atomic_number;
}
bool operator<(const Element &x) const {
return this->atomic_number < x.atomic_number;
}
};
template <class T, class S>
bool precedes(const T &a, const S &b) {
return a < b;
}
int main() {
// instructs cout to print true and false instead of 1 and 0
cout.setf(ios::boolalpha);
cout << precedes<int, double>(1, 42) << endl;
cout << precedes(9.1, 3) << endl;
cout << precedes(1.5f, 1.3) << endl;
Element na = 11;
Element mg = 12;
cout << precedes(na, mg) << endl;
return 0;
}
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