单项选择题

下列程序段的输出结果是 #include<iostream.h> void fun(int * x,int * y) { cout << * X << * y; *X=3; *y=4; } void main() { int x=1,y=2; fun(&y,&x); cout << X << y<<endl; {

A.2143
B.1212
C.1234
D.2112