в 15:31, 26 мая 2010

2010-05-26T15:31:18Z

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2010-05-26T11:38:55Z

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==Three dimensional Vector with IFormattable==

<source lang="csharp">
using System;
using System.Collections;
using System.Text;

class MainEntryPoint {
static void Main(string[] args) {
Vector Vect1 = new Vector(1.0, 2.0, 5.0);
foreach (double Component in Vect1) {
foreach (double Next in Vect1)
Console.Write(" " + Next);
Console.WriteLine(Component);
}
Console.ReadLine();
}
}
struct Vector : IFormattable {
public double x, y, z;
public IEnumerator GetEnumerator() {
return new VectorEnumerator(this);
}
public Vector(double x, double y, double z) {
this.x = x;
this.y = y;
this.z = z;
}
public string ToString(string format, IFormatProvider formatProvider) {
if (format == null)
return ToString();
string formatUpper = format.ToUpper();
switch (formatUpper) {
case "N":
return "|| " + Norm().ToString() + " ||";
case "VE":
return String.Format("( {0:E}, {1:E}, {2:E} )", x, y, z);
case "IJK":
StringBuilder sb = new StringBuilder(x.ToString(), 30);
sb.Append(" i + ");
sb.Append(y.ToString());
sb.Append(" j + ");
sb.Append(z.ToString());
sb.Append(" k");
return sb.ToString();
default:
return ToString();
}
}
public Vector(Vector rhs) {
x = rhs.x;
y = rhs.y;
z = rhs.z;
}
public override string ToString() {
return "( " + x + " , " + y + " , " + z + " )";
}
public double this[uint i] {
get {
switch (i) {
case 0:
return x;
case 1:
return y;
case 2:
return z;
default:
throw new IndexOutOfRangeException(
"Attempt to retrieve Vector element" + i);
}
}
set {
switch (i) {
case 0:
x = value;
break;
case 1:
y = value;
break;
case 2:
z = value;
break;
default:
throw new IndexOutOfRangeException(
"Attempt to set Vector element" + i);
}
}
}
private const double Epsilon = 0.0000001;
public static bool operator ==(Vector lhs, Vector rhs) {
if (System.Math.Abs(lhs.x - rhs.x) < Epsilon &&
System.Math.Abs(lhs.y - rhs.y) < Epsilon &&
System.Math.Abs(lhs.z - rhs.z) < Epsilon)
return true;
else
return false;
}
public static bool operator !=(Vector lhs, Vector rhs) {
return !(lhs == rhs);
}
public static Vector operator +(Vector lhs, Vector rhs) {
Vector Result = new Vector(lhs);
Result.x += rhs.x;
Result.y += rhs.y;
Result.z += rhs.z;
return Result;
}
public static Vector operator *(double lhs, Vector rhs) {
return new Vector(lhs * rhs.x, lhs * rhs.y, lhs * rhs.z);
}

public static Vector operator *(Vector lhs, double rhs) {
return rhs * lhs;
}
public static double operator *(Vector lhs, Vector rhs) {
return lhs.x * rhs.x + lhs.y + rhs.y + lhs.z * rhs.z;
}
public double Norm() {
return x * x + y * y + z * z;
}
private class VectorEnumerator : IEnumerator {
Vector theVector;
int location;
public VectorEnumerator(Vector theVector) {
this.theVector = theVector;
location = -1;
}
public bool MoveNext() {
++location;
return (location > 2) ? false : true;
}
public object Current {
get {
if (location < 0 || location > 2)
throw new InvalidOperationException(
"The enumerator is either before the first element or " +
"after the last element of the Vector");
return theVector[(uint)location];
}
}
public void Reset() {
location = -1;
}
}
}
</source>

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Csharp/C Sharp/Class Interface/IFormattable - История изменений

в 15:31, 26 мая 2010

Admin: 1 версия