A21569. ESP32 for Arduino程序如下，串口监视器显示的结果是？（ ）void setup() { Serial.begin(115200); int matrix[3][3], num = 9, sum = 0; for (int i = 0; i < 3; i++) { for (int j = 0; j < 3; j++) { matrix[i][j] = num; num--; } …

ESP32 for Arduino程序如下，串口监视器显示的结果是？（    ）

void setup() {
    Serial.begin(115200);
    int matrix[3][3], num = 9, sum = 0;
    for (int i = 0; i < 3; i++) {
        for (int j = 0; j < 3; j++) {
            matrix[i][j] = num;
            num--;
        }
    }
    for (int i = 0; i <= 2; i++) {
        for (int j = 0; j <= 2; j++) {
            if ((i % 2) && (j % 2))
                sum += matrix[i][j];
        }
    }
    Serial.println(sum);
}