first commit

2025-06-07 01:59:34 -04:00
commit 388ac241f0
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--- a/CS1322/p5/QuickSort.java
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+/**
+ *  <PRE>
+ *  QuickSort.java
+ *
+ *  Revisions: 1.0 Nov. 04, 2002
+ *               Created the QuickSort class
+ *			   1.1 Nov. 09, 2002
+ *				 Compiled, Finished, Commented
+ *
+ *  </PRE>
+ *
+ *	Collaboration Statement:
+ *    I worked on the homework assignment alone, using only             
+ *    course materials.
+ *  
+ *  Created with JCreatorLE, some indents are off when viewed through notepad
+ *    or EMACS
+ *
+ *  @author <A HREF="mailto:gtg184g@mail.gatech.edu">Jose Manuel Caban</A>
+ *  @version Version 1.1, Nov. 04, 2002
+ */
+
+public class QuickSort extends AbstractSort{
+
+  ////////////////
+  //Constructors//
+  ////////////////
+  
+  /**
+   *Constructor for QuickSort
+   *@param arrayWrap, the array to be sorted
+   */
+  public QuickSort(ArrayWrapper arrayWrap){
+    super(arrayWrap);
+  }
+	
+  ///////////
+  //Methods//
+  ///////////
+	
+  /**
+   *Sort the Array
+   */
+  public void doSort(){
+    quickSort(0,arrayWrap.length()-1);
+  }
+  
+  /**
+   *Recursive quicksort
+   */
+  private void quickSort(int iStart, int iEnd){
+  	/*
+  	 *Algorithm uses some converted C++ code that I learned back
+  	 *I originally learned this a little over a year ago
+  	 *it may be similar to some code available over the net or other books
+  	 *however, I have NO CLUE as to where it came from, as I said I learned 
+  	 *it from my teacher and understand it fully
+  	 */
+  	
+  	int iL=iStart, iR=iEnd;
+  	Comparable cTemp;
+    Comparable cPivot=arrayWrap.get((iStart+iEnd)/2);
+
+	do
+    {    
+        for(;arrayWrap.get(iL).compareTo(cPivot)<0;iL++); 
+        for(;arrayWrap.get(iR).compareTo(cPivot)>0;iR--);
+        
+        if (iL<=iR)
+        {
+            cTemp = arrayWrap.get(iL);
+            arrayWrap.swap(iL,iR);
+            arrayWrap.set(iR,cTemp);
+            iL++;
+            iR--;
+        }
+    }while(iL<=iR);
+
+    if (iStart<iR){
+    	quickSort(iStart, iR);
+    }
+    if (iL<iEnd){
+    	quickSort(iL, iEnd);
+    }
+  }//end quickSort()
+  
+  /***********************************************************/  
+    
+  /**
+   *  Debugging main for class QuickSort.  
+   *  This method will rigorously test my code.
+   *
+   *  <br><br>
+   *  @param args a String array of command line arguments.
+   */
+  public static void main(String[] args) {
+    ArrayWrapper aw = new ArrayWrapper(ArrayWrapper.getRandomIntegerArray(40));    
+    QuickSort qs = new QuickSort(aw);
+       		    
+    for(int i=0;i<aw.length();i++){
+    	System.out.println(aw.get(i));
+    }
+    qs.doSort();
+    System.out.println("\n/****Testing Now****/\n");
+    for(int i=0;i<aw.length();i++){
+    	System.out.println(aw.get(i));
+	}
+    
+  }// end of main(String[] args)
+
+}// end of class QuickSort