下列程序的运行结果是 [12] 。
include ＜iostream. h＞
class Sample
int x,y;
public:
Sample() x=y=0;
Sample(int a, int b) x=a;y=b;
void disp()
cout＜＜" x=" ＜＜x＜＜" , y="＜＜y＜＜end1;

;
void main()
Sample s1, s2(1, 2);
s1. disp0;
s2. disp ();