Add Length property to FailSoftArray : Properties « Class Interface « C# / C Sharp

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Add Length property to FailSoftArray
Add Length property to FailSoftArray

/*
C#: The Complete Reference 
by Herbert Schildt 

Publisher: Osborne/McGraw-Hill (March 8, 2002)
ISBN: 0072134852
*/

// Add Length property to FailSoftArray. 
 
using System; 
 
class FailSoftArray {  
  int[] a; // reference to underlying array  
  int len; // length of array -- underlies Length property 
 
  public bool errflag; // indicates outcome of last operation 
   
  // Construct array given its size.  
  public FailSoftArray(int size) { 
    a = new int[size]
    len = size;  
  
 
  // Read-only Length property. 
  public int Length 
    get 
      return len; 
    
  
 
  // This is the indexer for FailSoftArray. 
  public int this[int index] { 
    // This is the get accessor. 
    get 
      if(ok(index)) { 
        errflag = false
        return a[index]
      else 
        errflag = true
        return 0
      
    
 
    // This is the set accessor 
    set 
      if(ok(index)) { 
        a[index= value; 
        errflag = false
      
      else errflag = true
    
  
 
  // Return true if index is within bounds. 
  private bool ok(int index) { 
   if(index >= & index < Lengthreturn true
   return false
  
}  
  
// Demonstrate the improved fail-soft array. 
public class ImprovedFSDemo {  
  public static void Main() {  
    FailSoftArray fs = new FailSoftArray(5)
    int x; 
 
    // can read Length 
    for(int i=0; i < fs.Length; i++
      fs[i= i*10
 
    for(int i=0; i < fs.Length; i++) { 
      x = fs[i]
      if(x != -1Console.Write(x + " ")
    
    Console.WriteLine()
 
    // fs.Length = 10; // Error, illegal! 
  
}


           
       
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