C# 0 The Complete Reference

PART II

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651

      Console.Write(i + " ");

    Console.WriteLine();

  }

}

The output is shown here:

Original order: 1 2 3 4 5

Reversed order: 5 4 3 2 1

Range reversed: 5 2 3 4 1

Copying an Array

Copying all or part of one array to another is another common array operation. To copy an 

array, use 

Copy( )

.

Copy( )

 can put elements at the start of the destination array or in the 

middle, depending upon which version of 

Copy( )

 you use. 

Copy( )

 is demonstrated by the 

following program:

// Copy an array.

using System;

class CopyDemo {

  static void Main() {

    int[] source = { 1, 2, 3, 4, 5 };

    int[] target = { 11, 12, 13, 14, 15 };

    int[] source2 = { -1, -2, -3, -4, -5 };

    // Display source.

    Console.Write("source: ");

    foreach(int i in source)

      Console.Write(i + " ");

    Console.WriteLine();

    // Display original target.

    Console.Write("Original contents of target: ");

    foreach(int i in target)

      Console.Write(i + " ");

    Console.WriteLine();

    // Copy the entire array.

    Array.Copy(source, target, source.Length);

    // Display copy.

    Console.Write("target after copy:  ");

    foreach(int i in target)

      Console.Write(i + " ");

    Console.WriteLine();

    // Copy into middle of target.

    Array.Copy(source2, 2, target, 3, 2);

    // Display copy.

    Console.Write("target after copy:  ");

    foreach(int i in target)

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      Console.Write(i + " ");

    Console.WriteLine();

  }

}

The output is shown here:

source: 1 2 3 4 5

Original contents of target: 11 12 13 14 15

target after copy:  1 2 3 4 5

target after copy:  1 2 3 -3 -4