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若有以下程序:#include <iostream>using namespace std;class A{public:A() { }A(int i){x1=i;}v
若有以下程序: #include <iostream> using namespace std; class A { public: A() { } A(int i) { x1=i; } void dispa0 { 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<<endl; } 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
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