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( 15 )下列程序的输出结果是 【 15 】 。
#include
using namespace std;
class A {
int a;
public:
A():a(9){}
virtual void print() const { cout<<a;};
};
class B : public A {
char b;
public:
B( ){b='S';}
void print( ) const { cout <<b;}
};
void show(A &x){ x.print();}
int main()
{ A d1,*p;
B d2;
p=&d2;
d1.print();
d2.print();
p->print();
show(d1);
show(d2);
return 0;}
参考答案
更多 “ ( 15 )下列程序的输出结果是 【 15 】 。#includeusing namespace std;class A {int a;public:A():a(9){}virtual void print() const { couta;};};class B : public A {char b;public:B( ){b='S';}void print( ) const { cout b;}};void show(A x){ x.print();}int main(){ A d1,*p;B d2;p=d2;d1.print();d2.print();p-print();show(d1);show(d2);return 0;} ” 相关考题
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