Don't copy

c/bubble_sort.c

@@ -12,36 +12,32 @@
 
 #define BUFFER_SIZE 256
 
-int* bubble_sort(int* sorted, const int* values, const int count)
+int* bubble_sort(int* unsorted, const int count)
 {
-        int temp[count];
-        int holder;
-
-        memcpy(temp, values, sizeof(int) * count);
+        int t;
 
         for (int i = 0; i < count; i++) {
                 for (int j = 0; j < (count - i - 1); j++) {
-                        if (temp[j] > temp[j + 1]) {
-                                holder = temp[j];
-                                temp[j] = temp[j + 1];
-                                temp[j + 1] = holder;
+                        if (unsorted[j] > unsorted[j + 1]) {
+                                t = unsorted[j];
+                                unsorted[j] = unsorted[j + 1];
+                                unsorted[j + 1] = t;
                         }
                 }
         }
 
-        memcpy(sorted, temp, sizeof(int) * count);
-        return sorted;
+        return unsorted;
 }
 
 char* array_to_str(char* buffer, const int* array, int buffer_sz, int array_sz)
 {
-        char temp[BUFFER_SIZE];
+        char unsorted[BUFFER_SIZE];
         char result[BUFFER_SIZE];
         memset(result, '\0', sizeof(char) * BUFFER_SIZE);
 
         for (int i = 0; i < array_sz; i++) {
-                snprintf(temp, BUFFER_SIZE, "%d", array[i]);
-                strncat(result, temp, BUFFER_SIZE);
+                snprintf(unsorted, BUFFER_SIZE, "%d", array[i]);
+                strncat(result, unsorted, BUFFER_SIZE);
 
                 if (i + 1 != array_sz)
                         strncat(result, ", ", 2);
@@ -57,7 +53,6 @@ int main(void)
         char buffer[BUFFER_SIZE];
         int num;
 
-        printf("All elements must be integers\n");
         printf("How many elements? ");
         fgets(buffer, BUFFER_SIZE, stdin);
 
@@ -71,11 +66,9 @@ int main(void)
         }
 
 
-        int sorted[num];
-        bubble_sort(sorted, elements, num);
-
-        printf("Sorted:   [%s]\n", array_to_str(buffer, sorted, BUFFER_SIZE, num));
         printf("Unsorted: [%s]\n", array_to_str(buffer, elements, BUFFER_SIZE, num));
+        bubble_sort(elements, num);
+        printf("Sorted:   [%s]\n", array_to_str(buffer, elements, BUFFER_SIZE, num));
 
         return 0;
 }

csharp/bubble_sort.cs

@@ -15,7 +15,6 @@ class Ratio
         int num;
         int[] elements;
 
-        Console.WriteLine("All elements must integers");
         Console.Write("How many elements? ");
 
         try {
@@ -28,8 +27,8 @@ class Ratio
                 elements[i] = int.Parse(Console.ReadLine());
             }
 
-            Console.WriteLine("Sorted:   [{0}]", string.Join(", ", BubbleSort(elements)));
             Console.WriteLine("Unsorted: [{0}]", string.Join(", ", elements));
+            Console.WriteLine("Sorted:   [{0}]", string.Join(", ", BubbleSort(elements)));
         }
         catch {
             Environment.Exit(1);
@@ -39,24 +38,22 @@ class Ratio
 
     private static int[] BubbleSort(int[] unsorted)
     {
-        var sorted = new int[unsorted.Length];
-        unsorted.CopyTo(sorted, 0);
-        var count = sorted.Length;
+        var count = unsorted.Length;
         int t;
 
         for (int i = 0; i < count; i++)
         {
             for (int j = 0; j < (count - i - 1); j++)
             {
-                if (sorted[j] > sorted[j + 1])
+                if (unsorted[j] > unsorted[j + 1])
                 {
-                    t = sorted[j];
-                    sorted[j] = sorted[j + 1];
-                    sorted[j + 1] = t;
+                    t = unsorted[j];
+                    unsorted[j] = unsorted[j + 1];
+                    unsorted[j + 1] = t;
                 }
             }
         }
 
-        return sorted;
+        return unsorted;
     }
 }

go/bubble_sort.go

@@ -11,36 +11,24 @@ import (
     "strconv"
 )
 
-func copy(to_copy []int) []int {
-    copy := make([]int, len(to_copy))
-
-    for i, v := range to_copy {
-        copy[i] = v
-    }
-
-    return copy
-}
-
 func BubbleSort(unsorted []int) []int {
-    sorted := copy(unsorted)
-    count := len(sorted)
+    count := len(unsorted)
 
     for i := 0; i < count; i++ {
         for j := 0; j < (count - i - 1); j++ {
-            if sorted[j] > sorted[j + 1] {
-                t := sorted[j]
-                sorted[j] = sorted[j + 1]
-                sorted[j + 1] = t
+            if unsorted[j] > unsorted[j + 1] {
+                t := unsorted[j]
+                unsorted[j] = unsorted[j + 1]
+                unsorted[j + 1] = t
             }
         }
     }
 
-    return sorted
+    return unsorted
 }
 
 func main() {
     var input string
-    fmt.Printf("All elements must be integers\n")
 
     fmt.Printf("How many elements? ")
     fmt.Scanln(&input)
@@ -54,6 +42,6 @@ func main() {
         elements[i], _ = strconv.Atoi(input)
     }
 
-    fmt.Printf("Sorted:   %v\n", BubbleSort(elements))
     fmt.Printf("Unsorted: %v\n", elements)
+    fmt.Printf("Sorted:   %v\n", BubbleSort(elements))
 }

python/bubble_sort.py

@@ -19,7 +19,6 @@ def bubble_sort(unsorted):
 
     return sort
 
-print("All elements must be integers")
 num = input("How many elements? ")
 
 try:
@@ -32,5 +31,5 @@ try:
 except:
     exit(1)
 
-print("Sorted:   {0}".format(bubble_sort(elements)))
 print("Unsorted: {0}".format(elements))
+print("Sorted:   {0}".format(bubble_sort(elements)))

ruby/bubble_sort.rb

@@ -5,23 +5,21 @@
 # accompanying LICENSE file or http://www.opensource.org/licenses/MIT.
 
 def bubble_sort(unsorted)
-  sorted = unsorted.clone
-  count = sorted.count
+  count = unsorted.count
 
    count.times do |i|
     (count - i - 1).times do |j|
-      if sorted[j] > sorted[j+1]
-        t = sorted[j]
-        sorted[j] = sorted[j+1]
-        sorted[j+1] = t
+      if unsorted[j] > unsorted[j+1]
+        t = unsorted[j]
+        unsorted[j] = unsorted[j+1]
+        unsorted[j+1] = t
       end
     end
   end
 
-  sorted
+  unsorted
 end
 
-puts 'All elements must be integers'
 print 'How many elements? '
 num = gets.to_i
 
@@ -30,5 +28,5 @@ elements = Array.new(num) do |i|
   gets.to_i
 end
 
-print "Sorted:   #{elements}\n"
-print "Unsorted: #{bubble_sort(elements)}\n"
+print "Unsorted: #{elements}\n"
+print "Sorted:   #{bubble_sort(elements)}\n"