в 15:31, 26 мая 2010

2010-05-26T15:31:53Z

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==Add + operator for Complex type==

<source lang="csharp">using System;
public struct Complex
{
public Complex( double real, double imaginary ) {
this.real = real;
this.imaginary = imaginary;
}
static public Complex Add( Complex lhs, Complex rhs ) {
return new Complex( lhs.real + rhs.real, lhs.imaginary + rhs.imaginary );
}
static public Complex Add( Complex lhs, double rhs ) {
return new Complex( rhs + lhs.real, lhs.imaginary );
}
public override string ToString() {
return String.Format( "({0}, {1})", real, imaginary );
}
static public Complex operator+( Complex lhs, Complex rhs ) {
return Add( lhs, rhs );
}
static public Complex operator+( double lhs, Complex rhs ) {
return Add( rhs, lhs );
}
static public Complex operator+( Complex lhs, double rhs ) {
return Add( lhs, rhs );
}
private double real;
private double imaginary;
}
public class MainClass
{
static void Main() {
Complex cpx1 = new Complex( 1.0, 3.0 );
Complex cpx2 = new Complex( 1.0, 2.0 );
Complex cpx3 = cpx1 + cpx2;
Complex cpx4 = 20.0 + cpx1;
Complex cpx5 = cpx1 + 25.0;
Console.WriteLine( "cpx1 == {0}", cpx1 );
Console.WriteLine( "cpx2 == {0}", cpx2 );
Console.WriteLine( "cpx3 == {0}", cpx3 );
Console.WriteLine( "cpx4 == {0}", cpx4 );
Console.WriteLine( "cpx5 == {0}", cpx5 );
}
}</source>
<pre class=codeResult>cpx1 == (1, 3)
cpx2 == (1, 2)
cpx3 == (2, 5)
cpx4 == (21, 3)
cpx5 == (26, 3)</pre>

==An operator overloading: binary + 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 binary +.
public static TwoDimension operator +(TwoDimension op1, TwoDimension op2)
{
TwoDimension result = new TwoDimension();

result.x = op1.x + op2.x;
result.y = op1.y + op2.y;

return result;
}

// Overload binary -.
public static TwoDimension operator -(TwoDimension op1, TwoDimension op2)
{
TwoDimension result = new TwoDimension();

/* Notice the order of the operands. op1 is the left
operand and op2 is the right. */
result.x = op1.x - op2.x;
result.y = op1.y - op2.y;

return result;
}

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

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

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

c = a + b; // add a and b together
Console.Write("Result of a + b: ");
c.show();
Console.WriteLine();

c = a + b + c; // add a, b and c together
Console.Write("Result of a + b + c: ");
c.show();
Console.WriteLine();

c = c - a; // subtract a
Console.Write("Result of c - a: ");
c.show();
Console.WriteLine();

c = c - b; // subtract b
Console.Write("Result of c - b: ");
c.show();
Console.WriteLine();
}
}</source>
<pre class=codeResult>Here is a: 1, 2
Here is b: 10, 10
Result of a + b: 11, 12
Result of a + b + c: 22, 24
Result of c - a: 21, 22
Result of c - b: 11, 12</pre>

==Operator overloading: +, -==

<source lang="csharp">using System;
public class Point
{
public Point( int x, int y )
{
this.X = x;
this.Y = y;
}
public int X;
public int Y;
public static Point operator + ( Point a, Point b )
{
return new Point( a.X + b.X, a.Y + b.Y );
}
public static Point operator - ( Point a )
{
return new Point( - a.X , - a.Y );
}
static void Main(string[] args)
{
Point p = new Point( 3, 4 );
Point q = new Point( 36, -5 );
Point r = p + ( - q );
System.Console.WriteLine( "Result: x = {0}, y = {1}", r.X, r.Y );
}
}</source>
<pre class=codeResult>Result: x = -33, y = 9</pre>

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в 15:31, 26 мая 2010

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