A two-dimensional fail-soft array : Indexer « Class Interface « C# / C Sharp

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C# / C Sharp » Class Interface » Indexer 




A two-dimensional fail-soft array
A two-dimensional fail-soft array

/*
C#: The Complete Reference 
by Herbert Schildt 

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

// A two-dimensional fail-soft array. 
 
using System; 
 
class FailSoftArray2D {  
  int[,a; // reference to underlying 2D array  
  int rows, cols; // dimensions 
  public int Length; // Length is public 
 
  public bool errflag; // indicates outcome of last operation 
   
  // Construct array given its dimensions. 
  public FailSoftArray2D(int r, int c) { 
    rows = r; 
    cols = c; 
    a = new int[rows, cols]
    Length = rows * cols;  
  
 
  // This is the indexer for FailSoftArray2D. 
  public int this[int index1, int index2] { 
    // This is the get accessor. 
    get 
      if(ok(index1, index2)) { 
        errflag = false
        return a[index1, index2]
      else 
        errflag = true
        return 0
      
    
 
    // This is the set accessor. 
    set 
      if(ok(index1, index2)) { 
        a[index1, index2= value; 
        errflag = false
      
      else errflag = true
    
  
 
  // Return true if indexes are within bounds. 
  private bool ok(int index1, int index2) { 
   if(index1 >= & index1 < rows & 
      index2 >= & index2 < cols
         return true
 
   return false
  
}  
  
// Demonstrate a 2D indexer. 
public class TwoDIndexerDemo {  
  public static void Main() {  
    FailSoftArray2D fs = new FailSoftArray2D(35)
    int x; 
 
    // show quiet failures 
    Console.WriteLine("Fail quietly.")
    for(int i=0; i < 6; i++
      fs[i, i= i*10
 
    for(int i=0; i < 6; i++) { 
      x = fs[i,i]
      if(x != -1Console.Write(x + " ")
    
    Console.WriteLine()
 
    // now, generate failures 
    Console.WriteLine("\nFail with error reports.")
    for(int i=0; i < 6; i++) { 
      fs[i,i= i*10
      if(fs.errflag
        Console.WriteLine("fs[" + i + ", " + i + "] out-of-bounds")
    
 
    for(int i=0; i < 6; i++) { 
      x = fs[i,i]
      if(!fs.errflagConsole.Write(x + " ")
      else 
        Console.WriteLine("fs[" + i + ", " + i + "] out-of-bounds")
    
  
}


           
       














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