C++选择题2

A(){cout<<A;}
A(int){cout<<B;}
A(A &){cout<<C;}
};
int main()
{
A *p,a(1),b;
p=new A;
cout<<endl;
delete p;
system(pause);
return 0;
}

A( ) { a=0;cout<<a; }
A(int x) { a=x;cout<<a; }
A(A &t) { a=t.a+10;cout<<a; }
};
int main()
{
A a1,a2(1),a3(a2);
cout<<endl;
system(pause);
return 0;
}

A( ) { cout<<A; }
~A( ) { cout<<~A; }
};
class B{
public:

B( ) { cout<<B; }
~B( ) { cout<<~B; }
};
class C{
B b;
A a;
public:

C( ) { cout<<C; }
~C( ) { cout<<~C; }
};
int main(void)
{
C c;
system(pause);
return 0;
}

A( ){ a=1; cout<<a; }
~A(){ a--; cout<<a; }
};
class B{
int b;
A a1;
public:

B( ){ b=3; cout<<b; }
~B(){ b--; cout<<b; }
};
int main( )
{
B b;
cout<<endl;
system(pause);
return 0;
}

A(int t){ a=t; cout<<a; }
~A(){ a--; cout<<a; }
};
class B{
int b;
A a1;
public:

B(int t):a1(t*2){ b=t; cout<<b; }
~B(){ b--; cout<<b; }
};
int main(void)
{
B b(3);
cout<<endl;
system(pause);
return 0;
}

A* p;
public:

B(){cout<<B; p=new A(); }
~B(){cout<<~B; delete p; }
};
int main(void)
{
B obj;
system(pause);
return 0;
}

运行时的输出结果是( )。

A( ){ n++; }
void set(int t){ n+=t; }
static int get() {return n; }
};
int A::n;
int main( )
{
cout<<A::get(); // A行
A a1,a2; //B行
a2.set(3); //C行
cout<<a1.get()<<a2.get()<<endl; //D行
system(pause);
return 0;
}

A(int t){ m=t; n++; }
void set(int t){ m+=t; n+=t; }
void print(){ cout<<m<<n; }
};
int A::n;
int main( )
{
A a1(3),a2(5);
a1.set(4);
a2.print();
cout<<endl;
system(pause);
return 0;
}

A(int t){cout<<t<<endl;}
};
class B{
int a,b;
A c;
const int d;
int e;
int &f;
public:

B(int t):d(t++),f(a),b(t++),c(t++)
{
e=t++;
a=t++;
}
void print()
{
cout<<a<<b<<d<<e<<f<<endl;
}
};
int main()
{
B test(1);
test.print();
system(pause);
return 0;
}