Mega Code Archive
Testing the effects of passing array references by value and by reference
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using System;
public class ArrayReferenceTest
{
public static void Main( string[] args )
{
int[] firstArray = { 1, 2, 3 };
int[] firstArrayCopy = firstArray;
for ( int i = 0; i < firstArray.Length; i++ )
Console.Write( "{0} ", firstArray[ i ] );
FirstDouble( firstArray );
for ( int i = 0; i < firstArray.Length; i++ )
Console.Write( "{0} ", firstArray[ i ] );
if ( firstArray == firstArrayCopy )
Console.WriteLine("same" );
else
Console.WriteLine("different" );
int[] secondArray = { 1, 2, 3 };
int[] secondArrayCopy = secondArray;
for ( int i = 0; i < secondArray.Length; i++ )
Console.Write( "{0} ", secondArray[ i ] );
SecondDouble( ref secondArray );
for ( int i = 0; i < secondArray.Length; i++ )
Console.Write( "{0} ", secondArray[ i ] );
if ( secondArray == secondArrayCopy )
Console.WriteLine("same" );
else
Console.WriteLine("different" );
}
public static void FirstDouble( int[] array )
{
for ( int i = 0; i < array.Length; i++ )
array[ i ] *= 2;
array = new int[] { 11, 12, 13 };
}
public static void SecondDouble( ref int[] array )
{
for ( int i = 0; i < array.Length; i++ )
array[ i ] *= 2;
array = new int[] { 11, 12, 13 };
}
}
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