2.编写一个使用类模板对数组进行排序、元素查找,以及求元素累加和的程序。类 模板中包括数组成员,以对数组进行排序、元素查找、求元素累加和等功能的成员 函数。类模板的声明参考如下: const int SIZE=10; template < class T> class Array { private: T a[SIZE]; public: Array0; void sort(); int find(T k); T sumO; void print();

下面是使用类模板对数组进行排序、元素查找以及求元素累加和的程序：

#include <iostream>
using namespace std;

const int SIZE = 10;

template <class T>
class Array {
private:
    T a[SIZE];
public:
    Array() {
        for(int i = 0; i < SIZE; i++) {
            cout << "Enter element " << i+1 << ": ";
            cin >> a[i];
        }
    }

    void sort() {
        for(int i = 0; i < SIZE-1; i++) {
            for(int j = i+1; j < SIZE; j++) {
                if(a[i] > a[j]) {
                    T temp = a[i];
                    a[i] = a[j];
                    a[j] = temp;
                }
            }
        }
    }

    int find(T k) {
        for(int i = 0; i < SIZE; i++) {
            if(a[i] == k) {
                return i;
            }
        }
        return -1;
    }

    T sum() {
        T sum = 0;
        for(int i = 0; i < SIZE; i++) {
            sum += a[i];
        }
        return sum;
    }

    void print() {
        for(int i = 0; i < SIZE; i++) {
            cout << a[i] << " ";
        }
        cout << endl;
    }
};


int main() {
    cout << "Enter 10 integers:" << endl;
    Array<int> arr;
    cout << "Original array: ";
    arr.print();
    arr.sort();
    cout << "Sorted array: ";
    arr.print();
    int num;
    cout << "Enter number to find: ";
    cin >> num;
    int index = arr.find(num);
    if(index != -1) {
        cout << num << " found at index " << index << endl;
    } else {
        cout << num << " not found" << endl;
    }
    cout << "Sum of elements: " << arr.sum() << endl;
    return 0;
}

运行示例：

Enter 10 integers:
Enter element 1: 8
Enter element 2: 5
Enter element 3: 2
Enter element 4: 7
Enter element 5: 4
Enter element 6: 1
Enter element 7: 9
Enter element 8: 3
Enter element 9: 6
Enter element 10: 0
Original array: 8 5 2 7 4 1 9 3 6 0 
Sorted array: 0 1 2 3 4 5 6 7 8 9 
Enter number to find: 5
5 found at index 5
Sum of elements: 45