用c++的格式写一个代码，要求如下：写一个类模板，它有一个通用数组（既可作整数数组，又可作双精度小数数组），它有三个成员函数，其功能分别是，从键盘读取数据到数组、将数组数据保存到某个文件中、求数组中的最大元素。

#include <iostream>
#include <fstream>
using namespace std;

template<typename T>
class Array {
private:
    T *data;
    int size;
public:
    Array(int s) : size(s) {
        data = new T[size];
    }
    ~Array() {
        delete[] data;
    }
    void readData() {
        for (int i = 0; i < size; i++) {
            cin >> data[i];
        }
    }
    void saveToFile(string filename) {
        ofstream fout(filename);
        for (int i = 0; i < size; i++) {
            fout << data[i] << " ";
        }
        fout.close();
    }
    T getMax() {
        T maxVal = data[0];
        for (int i = 1; i < size; i++) {
            if (data[i] > maxVal) {
                maxVal = data[i];
            }
        }
        return maxVal;
    }
};

int main() {
    Array<int> intArr(5);
    cout << "Enter " << intArr.getSize() << " integers:\n";
    intArr.readData();
    cout << "The maximum integer in the array is: " << intArr.getMax() << endl;
    intArr.saveToFile("intArr.txt");

    Array<double> doubleArr(3);
    cout << "Enter " << doubleArr.getSize() << " doubles:\n";
    doubleArr.readData();
    cout << "The maximum double in the array is: " << doubleArr.getMax() << endl;
    doubleArr.saveToFile("doubleArr.txt");

    return 0;
}