в 15:31, 26 мая 2010

2010-05-26T15:31:53Z

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2010-05-26T12:18:54Z

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==Overload > and ==

<source lang="csharp">using System;

class TwoDimension {
int x, y;

public TwoDimension() {
x = y = 0;
}
public TwoDimension(int i, int j) {
x = i;
y = j;
}

// Overload <.
public static bool operator <(TwoDimension op1, TwoDimension op2)
{
if((op1.x < op2.x) && (op1.y < op2.y))
return true;
else
return false;
}

// Overload >.
public static bool operator >(TwoDimension op1, TwoDimension op2)
{
if((op1.x > op2.x) && (op1.y > op2.y))
return true;
else
return false;
}

// Show X, Y
public void show()
{
Console.WriteLine(x + ", " + y);
}
}

class TwoDimensionDemo {
public static void Main() {
TwoDimension a = new TwoDimension(5, 6);
TwoDimension b = new TwoDimension(10, 10);
TwoDimension c = new TwoDimension(1, 2);

Console.Write("Here is a: ");
a.show();
Console.Write("Here is b: ");
b.show();
Console.Write("Here is c: ");
c.show();
Console.WriteLine();

if(a > c) Console.WriteLine("a > c is true");
if(a < c) Console.WriteLine("a < c is true");
if(a > b) Console.WriteLine("a > b is true");
if(a < b) Console.WriteLine("a < b is true");
}
}</source>
<pre class=codeResult>Here is a: 5, 6
Here is b: 10, 10
Here is c: 1, 2
a > c is true
a < b is true</pre>

==Overloading Relational Operators==

<source lang="csharp">using System;
public class Employee: IComparable
{
public Employee(string name, int id)
{
this.name = name;
this.id = id;
}

int IComparable.rupareTo(object obj)
{
Employee emp2 = (Employee) obj;
if (this.id > emp2.id)
return(1);
if (this.id < emp2.id)
return(-1);
else
return(0);
}
public static bool operator <(Employee emp1, Employee emp2)
{
IComparable icomp = (IComparable) emp1;
return(icomp.rupareTo (emp2) < 0);
}
public static bool operator >(Employee emp1,Employee emp2)
{
IComparable icomp = (IComparable) emp1;
return(icomp.rupareTo (emp2) > 0);
}
public static bool operator <=(Employee emp1,Employee emp2)
{
IComparable icomp = (IComparable) emp1;
return(icomp.rupareTo (emp2) <= 0);
}
public static bool operator >=(Employee emp1,Employee emp2)
{
IComparable icomp = (IComparable) emp1;
return(icomp.rupareTo (emp2) >= 0);
}

public override string ToString()
{
return(name + ":" + id);
}

string name;
int id;
}
class Test
{
public static void Main()
{
Employee a = new Employee("A", 1);
Employee b = new Employee("B", 2);
Employee c = new Employee("C", 4);
Employee d = new Employee("D", 3);

Console.WriteLine("a < b: {0}", a < b);
Console.WriteLine("c >= d: {0}", c >= d);
}
}</source>
<pre class=codeResult>a < b: True
c >= d: True</pre>

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в 15:31, 26 мая 2010

Admin: 1 версия