3.4.txt

《Microsoft Visual C# .NET 2003开发技巧大全》源代码

Listing 3.4 Accessing Characters Using Indexers and Enumeration
using System;
using System.Text;
namespace _3_Characters
{
class Class1
{
[STAThread]
static void Main(string[] args)
{
string str = “abcdefghijklmnopqrstuvwxyz”;
str = ReverseString( str );
Console.WriteLine( str );
str = ReverseStringEnum( str );
Console.WriteLine( str );
}
static string ReverseString( string strIn )
{
StringBuilder sb = new StringBuilder(strIn.Length);
for( int i = 0; i < strIn.Length; ++i )
{
sb.Append( strIn[(strIn.Length-1)-i] );
}
return sb.ToString();
}
static string ReverseStringEnum( string strIn )
{
StringBuilder sb = new StringBuilder( strIn.Length );
foreach( char ch in strIn )
{
sb.Insert( 0, ch );
}
return sb.ToString();
}
}
}