单选题：如果已经定义int x;，则对指针变量pointer进行说明和初始化正确的是

如果已经定义int x;，则对指针变量pointer进行说明和初始化正确的是 @[D](2)

A. int pointer = &x;
B. int \*pointer = \*x;
C. int pointer = x;
D. int \*pointer = &x;




A.int pointer = &x;
B.int \*pointer = \*x;
C.int pointer = x;
D.int \*pointer = &x;


答案：D