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#include <iostream>
template <typename S, typename T>
class Pair {
public:
S first;
T second;
Pair(S s, T t) : first{s}, second{t} {}
void print() const {
std::cout << "(" << first << ", " << second << ")";
}
};
int main() {
Pair<int, char> p(42, 'x');
p.second = 'y';
std::cout << "p =";
p.print();
std::cout << std::endl;
Pair q(1.23, 7); // template argument deduction
std::cout << "q =";
q.print();
std::cout << std::endl;
std::cout << "int type name: " << typeid(7).name() << std::endl;
std::cout << "char type name: " << typeid('x').name() << std::endl;
std::cout << "double type name: " << typeid(1.23).name() << std::endl;
std::cout << "Type of p: " << typeid(p).name() << std::endl;
std::cout << "Type of q: " << typeid(q).name() << std::endl;
}
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