有如下程序:#include using namespace std;class A {public:A(int i){ x=i;}void dispa(){cout<<x<<’,’;)private: int x;class B;public A{publicB(int i); A(i+10){x=i}void dispb(){dispa();cout<<x<<endl;}private: int X;);int main() { B b(2);b.dispb();return 0; 运行时输出的结果是
A.10,2
B.12,10
C.12,10
D.2,2