有如下程序;#include ＜iostream＞using namespace std;classBase{public; Base(inti){x=i;}void dispa0{cout＜＜x＜＜’,’;}private;int x;};classDerived;publicBase{public; Derived(int i);Base(i+10) {x=i;)void dispb(){dispa();cout＜＜x＜＜end1;}private;int x;};int main(){ Derived b(2) ; B、dispb();return 0;}运行的结果是()。