执行以下程序后的输出结果为( )。#include＜iostream. b＞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 s(2,3), *p=&s; p-＞disp();}

A．x=1, y=3

B．x=2, y=4

C．x=3, y=2

D．x=2, y=3