重载
using System;
class Vector
{
private double XVector;
private double YVector;
//构造函数
public Vector(double x, double y )
{
XVector = x;
YVector = y;
}
//获取向量的长度
public double GetLength( )
{
double Length = Math.Sqrt( XVector*XVector + YVector*YVector );
return Length;
}
//重载运算符==
public static bool operator == ( Vector a, Vector b )
{
return ( (a.XVector == b.XVector) && (a.YVector == b.YVector) );
}
//重载运算符!=
public static bool operator != ( Vector a, Vector b )
{
return !( a == b );
}
//重载运算符>：以向量长度判断是否为真
public static bool operator > ( Vector a, Vector b )
{
return a.GetLength( ) > b.GetLength( );
}
//重载运算符<
public static bool operator < ( Vector a, Vector b )
{
return a.GetLength( ) < b.GetLength( );
}
//重载运算符>=
public static bool operator >= ( Vector a, Vector b )
{
return ( a == b ) || ( a > b );
}
//重载运算符<=
public static bool operator <= ( Vector a, Vector b )
{
return ( a == b ) || ( a < b );
}
}
class Test
{
static public void Main( )
{
Vector vector1 = new Vector( 3, 4 );
Vector vector2 = new Vector( 0, 5 );
Vector vector3 = new Vector( 2, 2 );
Console.WriteLine("向量1为( 3, 4 ) /t 向量2为( 0, 5 ) /t 向量3为( 2, 2 )");
Console.WriteLine("向量1 == 向量2 为：{0}", vector1 == vector2 );
Console.WriteLine("向量1 != 向量2 为：{0}", vector1 != vector2 );
Console.WriteLine("向量1 > 向量3 为：{0}", vector1 > vector3 );
Console.WriteLine("向量2 < 向量3 为：{0}", vector2 < vector3 );
Console.WriteLine("向量1 >= 向量2 为：{0}", vector1 != vector2 );
Console.WriteLine("向量1 <= 向量2 为：{0}", vector1 != vector2 );
}
}
虚方法的声明和使用
using System;
public class Graph
{
protected double ParaVal;
protected double pi = 3.1415926;
public Graph ( double Para )
{
ParaVal = Para;
}
//定义虚方法：求面积
public virtual double Area( )
{
return ParaVal;
}
}
//图形的子类正方形
public class Square : Graph
{
public Square( double Para ) : base ( Para )
{
}
//重载正方形求面积的方法
public override double Area( )
{
return ParaVal * ParaVal;
}
}
//图形的子类等边三角形
public class EqTriangle : Graph
{
public EqTriangle( double Para ) : base ( Para )
{
}
//重载等边三角形求面积的方法
public override double Area()
{
return ParaVal * ParaVal * Math.Sin( pi/3 ) / 2;
}
}
//图形的子类圆
public class Circle : Graph
{
public Circle( double Para ) : base( Para )
{
}
//重载圆求面积的方法
public override double Area( )
{
return pi * ParaVal * ParaVal;
}
}
class Test
{
public static void Main( )
{
double Length = 6;
Graph Init = new Graph( Length );
Graph Squa = new Square( Length );
Graph Tria = new EqTriangle( Length );
Graph Circ = new Circle( Length );
Console.WriteLine("原始图形的面积是：/t{0}", Init.Area());
Console.WriteLine("正方形的面积是：/t{0}", Squa.Area());
Console.WriteLine("等边三角形的面积是：/t{0}", Tria.Area());
Console.WriteLine("圆形的面积是： /t{0}", Circ.Area());
}
}