C++ 统计二维数组中大于等于平均值的元素和与个数

#include <iostream>
using namespace std;

int main() {
    int arr[3][4];
    int sum = 0, count = 0;
    // 输入
    for (int i = 0; i < 3; i++) {
        for (int j = 0; j < 4; j++) {
            cin >> arr[i][j];
            sum += arr[i][j];
        }
    }
    // 求平均值
    double avg = (double)sum / 12;
    // 统计满足条件的元素个数和和
    for (int i = 0; i < 3; i++) {
        for (int j = 0; j < 4; j++) {
            if (arr[i][j] >= avg) {
                count++;
                sum += arr[i][j];
            }
        }
    }
    // 输出
    cout << sum << ',' << count << endl;
    return 0;
}