#include <iostream>


template<class T>
 void swap(T& x,T& y)
 {
   T temp = x;
   x = y;
   y = temp;
 }


int main(){

    float a = 1.12, b = 2.45;

    swap(a,b);
    std::cout << "a: " << a << std::endl << "b: " << b << std::endl;

    char c = '-', d = '$';
    swap(c,d);
    std::cout << "c: " << c << std::endl << "d: " << d << std::endl;

    return 0;
}