单项选择题

下列程序的运行结果为
  # include <iostream.h>
  int i=0;
  classA
  public:
    A( ) i + + ;
  ;
  void main( )
  
    A a,b[3],* c;
    C=b;
    cout << i << endl;

A.2
B.3
C.4
D.5