fix dynamic array issues in sorting folder

(cherry picked from commit 01b69fcb24)

sorting/shell_sort.cpp

@@ -1,45 +1,37 @@
 #include <iostream>
-using namespace std;
 
-int main()
-{
-	int size = 10;
-	int array[size];
-	// Input
-	cout << "\nHow many numbers do want to enter in unsorted array : ";
-	cin >> size;
-	cout << "\nEnter the numbers for unsorted array : ";
-	for (int i = 0; i < size; i++)
-	{
-		cin >> array[i];
-	}
+int main() {
+    int size = 10;
+    int* array = new int[size];
+    // Input
+    std::cout << "\nHow many numbers do want to enter in unsorted array : ";
+    std::cin >> size;
+    std::cout << "\nEnter the numbers for unsorted array : ";
+    for (int i = 0; i < size; i++) {
+        std::cin >> array[i];
+    }
 
-	// Sorting
-	for (int i = size / 2; i > 0; i = i / 2)
-	{
-		for (int j = i; j < size; j++)
-		{
-			for (int k = j - i; k >= 0; k = k - i)
-			{
-				if (array[k] < array[k + i])
-				{
-					break;
-				}
-				else
-				{
-					int temp = array[k + i];
-					array[k + i] = array[k];
-					array[k] = temp;
-				}
-			}
-		}
-	}
+    // Sorting
+    for (int i = size / 2; i > 0; i = i / 2) {
+        for (int j = i; j < size; j++) {
+            for (int k = j - i; k >= 0; k = k - i) {
+                if (array[k] < array[k + i]) {
+                    break;
+                } else {
+                    int temp = array[k + i];
+                    array[k + i] = array[k];
+                    array[k] = temp;
+                }
+            }
+        }
+    }
 
-	// Output
-	cout << "\nSorted array : ";
-	for (int i = 0; i < size; ++i)
-	{
-		cout << array[i] << "\t";
-	}
-	return 0;
+    // Output
+    std::cout << "\nSorted array : ";
+    for (int i = 0; i < size; ++i) {
+        std::cout << array[i] << "\t";
+    }
+
+    delete[] array;
+    return 0;
 }