执行下面程序后,输出结果是( )。
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; }
7 0
7 1
7 2
7 3