Member Functions Defined Outside the Template

1#include <iostream>
2#include <string>
3 
4template <typename T>
5class Box {
6    T m_value;
7public:
8    Box(T value);
9    T get() const;
10    void set(T value);
11    void show() const;
12};
13 
14template <typename T>
15Box<T>::Box(T value) : m_value(value) {
16    std::cout << "Box made\n";
17}
18 
19template <typename T>
20T Box<T>::get() const {
21    return m_value;
22}
23 
24template <typename T>
25void Box<T>::set(T value) {
26    m_value = value;
27}
28 
29template <typename T>
30void Box<T>::show() const {
31    std::cout << "Box holds " << m_value << "\n";
32}
33 
34int main() {
35    Box<int> a(5);
36    Box<std::string> b("cat");
37    a.set(a.get() * 2);
38    b.set(b.get() + "s");
39    a.show();
40    b.show();
41    std::cout << a.get() + 1 << "\n";
42    return 0;
43}