如何在C++中交换两个不同数据类型的值

#include <iostream>

template <typename T>
void swapValues(T& a, T& b) {
    T temp = a;
    a = b;
    b = temp;
}

int main() {
    int num1 = 10;
    int num2 = 20;
    std::cout << "Before swapping: num1 = " << num1 << ", num2 = " << num2 << std::endl;
    swapValues(num1, num2);
    std::cout << "After swapping: num1 = " << num1 << ", num2 = " << num2 << std::endl;

    double dbl1 = 3.14;
    double dbl2 = 2.71;
    std::cout << "Before swapping: dbl1 = " << dbl1 << ", dbl2 = " << dbl2 << std::endl;
    swapValues(dbl1, dbl2);
    std::cout << "After swapping: dbl1 = " << dbl1 << ", dbl2 = " << dbl2 << std::endl;

    return 0;
}

Before swapping: num1 = 10, num2 = 20
After swapping: num1 = 20, num2 = 10
Before swapping: dbl1 = 3.14, dbl2 = 2.71
After swapping: dbl1 = 2.71, dbl2 = 3.14