5.数组-C#高级编程

using System;

namespace Wrox.ProCSharp.Arrays
{
public class Person
{
public string FirstName { get; set; }

public string LastName { get; set; }

public override string ToString()
{
return String.Format("{0} {1}", FirstName, LastName);
}
}

}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Wrox.ProCSharp.Arrays
{
class Program
{
static void Main()
{
SimpleArrays();
TwoDim();
ThreeDim();
Jagged();

ArrayClass();
CopyArrays();

}

static void CopyArrays()
{
Person[] beatles = {
new Person { FirstName="John", LastName="Lennon" },
new Person { FirstName="Paul", LastName="McCartney" }
};

Person[] beatlesClone = (Person[])beatles.Clone();

}

static void ArrayClass()
{
Array intArray1 = Array.CreateInstance(typeof(int), 5);
for (int i = 0; i < 5; i++)
{
intArray1.SetValue(33, i);
}

for (int i = 0; i < 5; i++)
{
Console.WriteLine(intArray1.GetValue(i));
}

int[] lengths = { 2, 3 };
int[] lowerBounds = { 1, 10 };
Array racers = Array.CreateInstance(typeof(Person), lengths, lowerBounds);

racers.SetValue(new Person { FirstName = "Alain", LastName = "Prost" }, index1: 1, index2: 10);
racers.SetValue(new Person
{
FirstName = "Emerson",
LastName = "Fittipaldi"
}, 1, 11);
racers.SetValue(new Person { FirstName = "Ayrton", LastName = "Senna" }, 1, 12);
racers.SetValue(new Person { FirstName = "Michael", LastName = "Schumacher" }, 2, 10);
racers.SetValue(new Person { FirstName = "Fernando", LastName = "Alonso" }, 2, 11);
racers.SetValue(new Person { FirstName = "Jenson", LastName = "Button" }, 2, 12);

Person[,] racers2 = (Person[,])racers;
Person first = racers2[1, 10];
Person last = racers2[2, 12];

}

static void Jagged()
{
int[][] jagged = new int[3][];
jagged[0] = new int[2] { 1, 2 };
jagged[1] = new int[6] { 3, 4, 5, 6, 7, 8 };
jagged[2] = new int[3] { 9, 10, 11 };

for (int row = 0; row < jagged.Length; row++)
{
for (int element = 0;
element < jagged[row].Length; element++)
{
Console.WriteLine(
"row: {0}, element: {1}, value: {2}",
row, element, jagged[row][element]);
}
}

}

static void ThreeDim()
{
int[, ,] threedim = {
{ { 1, 2 }, { 3, 4 } },
{ { 5, 6 }, { 7, 8 } },
{ { 9, 10 }, { 11, 12 } }
};

Console.WriteLine(threedim[0, 1, 1]);
}

static void TwoDim()
{
int[,] twodim = new int[3, 3];
twodim[0, 0] = 1;
twodim[0, 1] = 2;
twodim[0, 2] = 3;
twodim[1, 0] = 4;
twodim[1, 1] = 5;
twodim[1, 2] = 6;
twodim[2, 0] = 7;
twodim[2, 1] = 8;
twodim[2, 2] = 9;

}

static void SimpleArrays()
{
Person[] myPersons = new Person[2];

myPersons[0] = new Person { FirstName = "Ayrton", LastName = "Senna" };
myPersons[1] = new Person { FirstName = "Michael", LastName = "Schumacher" };

Person[] myPersons2 =
{
new Person { FirstName="Ayrton", LastName="Senna"},
new Person { FirstName="Michael", LastName="Schumacher"}
};
}
}
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ArraySegmentSample
{
class Program
{
static void Main()
{
int[] ar1 = { 1, 4, 5, 11, 13, 18 };
int[] ar2 = { 3, 4, 5, 18, 21, 27, 33 };
var segments = new ArraySegment<int>[2]
{
new ArraySegment<int>(ar1, 0, 3),
new ArraySegment<int>(ar2, 3, 3)
};

var sum = SumOfSegments(segments);
Console.WriteLine("sum of all segments: {0}", sum);

}

static int SumOfSegments(ArraySegment<int>[] segments)
{
int sum = 0;
foreach (var segment in segments)
{
for (int i = segment.Offset; i < segment.Offset + segment.Count; i++)
{
sum += segment.Array[i];
}

}
return sum;
}
}
}