单选题库

struct Device {
    int id;
    int state;
};

void reset(Device d) {
    d.state = 0;
}

void start(Device &d) {
    d.state += 1;
}

int main() {
    Device d{7, 2};
    reset(d);
    start(d);
    cout << d.id << " " << d.state;
    return 0;
}

int score = 60;

void update(int &score) {
    score += 5;
}

int main() {
    int score = 80;
    update(score);
    cout << score << " " << ::score;
    return 0;
}

void addOne(________, int  r) {
     for (int j = 0; j < 5; j++) {
         arr[r][j]++;
     }
}

int goods[3][4]  = {{2, 4,  6, 8}, {10, 12, 14,  16}, {18, 20, 22,  24}};
int (*p)[4]  = goods;
int x  = *(*(p + 1) + 2);

int a  = 10;
int b  = 20;
const  int *p = &a;