在接口中添加方法？？？？我调不出来。。

Question

using System;
interface IVehicle
{
public void start(int x);
public void stop(int x);
}
class Bike : IVehicle { }
class Bus : IVehicle { }
class interfaceDemo
{
public static void main()
{
Bike b1 = new Bike();
Bus b2 = new Bus();

}

}

Answer 1

''''using System;
interface IVehicle
{
void start(int x);
void stop(int x);
}

class Bike : IVehicle {
public void start(int x)
{
//...
}
public void stop(int x)
{
//...
}
}
class Bus : IVehicle {
public void start(int x)
{
//...
}
public void stop(int x)
{
//...
}
}

class interfaceDemo
{
public static void main()
{
Bike b1 = new Bike();
Bus b2 = new Bus();

 using System;
 interface IVehicle
 {
void start(int x);
void stop(int x);
 }

class Bike : IVehicle {
public void start(int x)
{
    //...
}
public void stop(int x)
{
  //...
}
}
 class Bus : IVehicle { 
 public void start(int x)
{
    //...
}
public void stop(int x)
{
  //...
}
 }

 class interfaceDemo
 {
 public static void main()
 {
 Bike b1 = new Bike();
 Bus b2 = new Bus();
}
}
'
'''