若有以下程序: #include <iostream> using namespace std; class Base { private: int a,b; public: Base(int x, int y) { a=x; b=y; } void show() { cout<<a<<", "<<b<<end1; } }; class Derive : public Base { private: int c, d; public: Derive(int x, int y, int z,int m):Base(x,y) { c=z; d=m; } void show() { cout<<c<<", "<<d<<end1; } }; int main ( ) { Base b(50,50) ,*pb; Derive d(10,20,30,40); pb=&d; pb->show {); return 0; }
A.10,20
B.30,40
C.20,30
D.50,50
第1题:
第2题:
若有以下程序: #include <iost ream> using namespace std; class A { private: int a; public: A(int i) { a=i; } void disp () { cout<<a<<", "; } }; class B { private:
A.10,10,10
B.10,12,14
C.8,10,12
D.8,12,10
第3题:
有以下程序 #include<iostream> using namespace std; class Base { private: char c; public: Base(char n):c(n){} ~Base() { cout<<c; } }; class Derived:public Base { private: char c; public: Derived(char n):Base(n+1),c(n){} ~Derived() { cout<<c; } }; int main() { Derived obj('x'); return 0; } 执行后的输出结果是
A.xy
B.yx
C.x
D.y
第4题:
若有以下程序: #include<iostream> using namespace std; class A {private: int a; public: A(int i) {a=i;} void disp() {cout<<a<<“,”;}}; class B {private: int b; public: B(int j {b=j;} void disp() {cout<<b<<
A.10,10,10
B.10,12,14
C.8,10,12
D.8,12,10
第5题:
有以下程序#include <iostream>using namespace std:class Base{private: char c;public: Base(char n) :c(n) {} ~Base ( ) { cout<<c; }}; class Derived : public Base{private: char c;public: Derived(char n):Base (n+1),c(n) {} ~Derived() { cout<<c; }};int main(){ Derived obj('x'); return 0;} 执行后的输出结果是
A.xy
B.yx
C.x
D.y
第6题:
有以下程序: #include <iostream> using namespace std; class BASE { private: char c; public: BASE(char n):c(n);{} virtual~BASE() { cout<<c; } }; class DERIVED:public BASE { char c; p
A.XY
B.YX
C.X
D.Y
第7题:
若有以下程序: #include <iostream> using namespace std; class Base { public: Base() { x=0; } int x; }; class Derivedl: virtual public Base { public: Derivedl() { x=10; } }; class Derived2: virtual public Base { public: Derived2() ( x=20; } }; class Derived: public Derivedl,protected Derived2 { }; int main() { Derived obj; cout<<obj.x<<end1; return 0; } 该程序运行后的输出结果是
A.20
B.30
C.10
D.0
第8题:
有以下程序: #include <iostream> #include <string> using namespace std; class base { private: char baseName[10]; public: base ( ) { strcpy (baseName, "Base"); } virtual char *myName() {
A.DerivedBase
B.BaseBase
C.DerivedDerived
D.BaseDerived
第9题:
有以下程序:
include<iostream>
using namespace std;
class Base
{
public:
Base()
{
K=0;
}
int x;
};
class Derivedl:virtual public Base
{
public:
Derivedl()
{
x=10;
}
};
class Derived2:virtua1 public Base