虚方法
using System;
namespace app{
class MyClass{
public static void Main(string[] args){
B b= new B();
A a= new A();
Console.WriteLine(a.a(13));
Console.WriteLine(b.a(13));
}
}
class A{
int b=1;
public int a(){
return b;
}
public virtual int a( int _b){ //虚方法
return b=_b;
}
}
class B:A{
public override int a (int _b){
return base.a(88);
}
}
}25
25
1
using System;2
namespace app{3
class MyClass{4
public static void Main(string[] args){5
B b= new B();6
A a= new A();7
Console.WriteLine(a.a(13));8
Console.WriteLine(b.a(13));9
}10
}11
class A{12
int b=1;13
public int a(){14
return b;15
}16
public virtual int a( int _b){ //虚方法17
return b=_b;18
}19
} 20
class B:A{21
public override int a (int _b){22
return base.a(88);23
}24
}25
}using System;
namespace app{
class MyClass{
public static void Main(string[] args){
B b= new B();
A a= new A();
Console.WriteLine(a.a(13));
Console.WriteLine(b.a(13));
}
}
class A{
int b=1;
public int a(){
return b;
}
public int a( int _b){ //虚方法
return b=_b;
}
}
class B:A{
public new int a (int _b){ //
return base.a(88);
}
}
}25
25
1
using System;2
namespace app{3
class MyClass{4
public static void Main(string[] args){5
B b= new B();6
A a= new A();7
Console.WriteLine(a.a(13));8
Console.WriteLine(b.a(13));9
}10
}11
class A{12
int b=1;13
public int a(){14
return b;15
}16
public int a( int _b){ //虚方法17
return b=_b;18
}19
} 20
class B:A{21
public new int a (int _b){ //22
return base.a(88);23
}24
}25
}using System;
namespace app{
class MyClass{
public static void Main(string[] args){
B b= new B();
A a= new A();
Console.WriteLine(a.a(13));
Console.WriteLine(b.a(13));
}
}
class A{
int b=1;
public int a(){
return b;
}
public virtual int a( int _b){ //虚方法
return b=_b;
}
}
class B:A{
public override sealed int a (int _b){
return base.a(88);
}
}
class C:B{
public override int a (int _b){ //报错
return base.a(88);
}
}
}30
30
1
using System;2
namespace app{3
class MyClass{4
public static void Main(string[] args){5
B b= new B();6
A a= new A();7
Console.WriteLine(a.a(13));8
Console.WriteLine(b.a(13));9
}10
}11
class A{12
int b=1;13
public int a(){14
return b;15
}16
public virtual int a( int _b){ //虚方法17
return b=_b;18
}19
} 20
class B:A{21
public override sealed int a (int _b){22
return base.a(88);23
}24
}25
class C:B{26
public override int a (int _b){ //报错27
return base.a(88);28
}29
}30
}using System;
namespace app {
class MyClass {
public static void Main (string[] args) {
B b = new B ();
A a = new A ();
a.a ();
b.a ();
a = b; //访问基类的方法
a.a ();
}
}
class A {
public void a () { //虚方法
Console.WriteLine ("虚方法！");
}
}
class B : A {
public new void a () {
Console.WriteLine ("新虚方法！");
}
}
}23
1
using System;2
namespace app {3
class MyClass {4
public static void Main (string[] args) {5
B b = new B ();6
A a = new A ();7
a.a ();8
b.a ();9
a = b; //访问基类的方法10
a.a ();11
}12
}13
class A {14
public void a () { //虚方法15
Console.WriteLine ("虚方法！");16
}17
}18
class B : A {19
public new void a () {20
Console.WriteLine ("新虚方法！");21
}22
}23
}using System;
class Dog{
public static void Main(string[] args){
B b = new B();
A a= new A();
b.a();
a.a();
a=b;
a.a();//B类的方法
}
}
class A{
public virtual void a(){
Console.WriteLine("A.a方法");
}
}
class B:A{
public override void a(){
Console.WriteLine("B.a方法");
}
}23
1
using System;2
class Dog{3
public static void Main(string[] args){4
B b = new B();5
A a= new A();6
b.a();7
a.a();8
a=b;9
a.a();//B类的方法10
}11
}12
class A{13
public virtual void a(){14
Console.WriteLine("A.a方法");15
}16
}17
18
class B:A{19
public override void a(){20
Console.WriteLine("B.a方法");21
}22
}