编写一个求任意类型数组中最大元素和最小元素的程序，要求将求最大元素和最小元素的函数设计成函数模板。

下面是一个求任意类型数组中最大元素和最小元素的程序，其中`find_max`和`find_min`函数被设计成函数模板：

#include <iostream>

template <typename T>
T find_max(T arr[], int n) {
    T max = arr[0];
    for (int i = 1; i < n; i++) {
        if (arr[i] > max) {
            max = arr[i];
        }
    }
    return max;
}

template <typename T>
T find_min(T arr[], int n) {
    T min = arr[0];
    for (int i = 1; i < n; i++) {
        if (arr[i] < min) {
            min = arr[i];
        }
    }
    return min;
}

int main() {
    int int_arr[] = {3, 1, 4, 1, 5, 9, 2, 6, 5, 3};
    double double_arr[] = {3.14, 2.71, 1.41, 1.62, 1.73};
    char char_arr[] = {'h', 'e', 'l', 'l', 'o'};

    int int_max = find_max(int_arr, 10);
    int int_min = find_min(int_arr, 10);

    double double_max = find_max(double_arr, 5);
    double double_min = find_min(double_arr, 5);

    char char_max = find_max(char_arr, 5);
    char char_min = find_min(char_arr, 5);

    std::cout << "Max of int_arr: " << int_max << std::endl;
    std::cout << "Min of int_arr: " << int_min << std::endl;
    std::cout << "Max of double_arr: " << double_max << std::endl;
    std::cout << "Min of double_arr: " << double_min << std::endl;
    std::cout << "Max of char_arr: " << char_max << std::endl;
    std::cout << "Min of char_arr: " << char_min << std::endl;

    return 0;
}

输出结果：

Max of int_arr: 9
Min of int_arr: 1
Max of double_arr: 3.14
Min of double_arr: 1.41
Max of char_arr: o
Min of char_arr: e