若有以下程序:
#include <iostream>
using namespaces std;
class A
public:
A()
A(int i)
x1=i;
void dispa()
cout<<’x1="<<x1<<",";
private:
int x1;
;
class B: public A
public:
B()
B(int i):A(i+10)
x2=i;
void dispb()
dispa();
cout<<"x2="<<x2<<end1;
private:
int x2;
;
int main()
B b(2);
b.dispb():
return 0;
程序运行后的输出结果是
A.x1=10,x2=2
B.x1=12,x2=10
C.x1=12,x2=2
D.x1:2,x2=2