[C++] Template(템플릿)

#include <iostream>
#include <iomanip>
using namespace std;
 
template <typename T>
 
void change(T &a, T &b) {
    int  temp;
    temp = a;
    a = b;
    b = temp;
}
 
void main() {
    int a = 1, b = 2;
    char c = 'A', d = 'B';
    float e = 3.7f, f = 4.3f;
 
    change(a, b);
    cout << a << setw(10) << b << endl;
 
    change(c, d);
    cout << c << setw(10) << d << endl;
 
    change(e, f);
    cout << e << setw(10) << f << endl;
}