下列类的定义中,有( )处语法错误。 class Base { public: Base(){} Base(int i) { data=i; } private: int data; }; class Derive: public Base { public: Derive(): Base(0){} Derive(int x) { d=x; } void setvalue(int i) { data=i; } private: d; }
A.1
B.2
C.3
D.4
第1题:
下面程序的打印结果是【 】。
include <iostream>
using namespace std;
class Base
{
public:
Base(int x)
{
a=x;
}
void show()
{
cout<<a;
}
private:
int a;
};
class Derived : public Base
{
public:
Derived(int i) :Base(i+1) ,b(i) { }
void show()
{
cout<<b;
}
private:
int b;
};
int main ( )
{
Base b(5) , *pb;
Derived d(1);
pb=&d;
pb->show();
return 0;
}
第2题:
下列类的定义中,有( )处语法错误。 class Base { public: Base(){} Base(int i) { data=i; } private: int data; }; class Derive : public Base { public: Derive() : Base(O) {} Derive (int x) { d=x; } void setvalue(int i) { data=i; } private: int d; };
A.1
B.2
C.3
D.4
第3题:
下列类的定义中,有( )处语法错误。 class Base { publiC: Base(){} Base(int i) { data=i; } ptivate: int data; }; class DeriVe:public Base { public: Derive():Base(0){} Derive(int x) { d=x; } void setvalue(int i) { data=i; } private: d; };
A.1
B.2
C.3
D.4
第4题:
为完成下面的程序,应在划线处填入的语句是( )。 #include <iostream> using namespace std; class Base { private: int x; public: Base(int i) { x=i; } ~Base(){} }; class Derived : public Base { public: _______________ //完成类Derive构造函数的定义 }; int main() { Derived Obj; return 0; }
A.Derived(int i):Base(i){}
B.Derived(){}
C.voidDerived(int i):Base(0){}
D.Derived(int i){Base(i);}
第5题:
有以下程序: #inClUde <iostream> using namespace std; Class Base { public: Base(int x) { a=x; } void show() { cout<<a; } private: int a; }; class Derived : public Base { public: Derived(int i) :Base(i+1),b(i){} void Show() { cout<<b; } private: int b; }; int main() { Base b(5),*pb; Derived d(1); pb=&d; pb->show(); return 0; } 运行后的输出结果是( )。
A.1
B.5
C.2
D.0