diff --git a/com/williamfiset/datastructures/shell sort b/com/williamfiset/datastructures/shell sort
new file mode 100644
index 0000000..5f43b0a
--- /dev/null
+++ b/com/williamfiset/datastructures/shell sort	
@@ -0,0 +1,31 @@
+#include<stdio.h>
+void main()
+{
+int arr[10]={-1};
+	 int i, j, n, flag = 1, gap_size, temp;
+	 printf("\n Enter the number of elements in the array: ");
+	 scanf("%d", &n);
+	 printf("\n Enter %d numbers: ",n); // n was added
+	 for(i=0;i<n;i++)
+	 scanf("%d", &arr[i]);
+	 gap_size = n;
+	 while(flag == 1 || gap_size > 1)
+{
+	 	 flag = 0;
+	 	 gap_size = (gap_size + 1) / 2;
+	 	 for(i=0; i< (n - gap_size); i++)
+ {
+	 	 	 if( arr[i+gap_size] < arr[i])
+ {
+	 	 	 	 temp = arr[i+gap_size];
+	 	 	 	 arr[i+gap_size] = arr[i];
+	 	 	 	 arr[i] = temp;
+	 	 	 	 flag = 0;
+ }
+ }
+}
+	 printf("\n The sorted array is: \n");
+	 for(i=0;i<n;i++){
+	 	 printf(" %d\t", arr[i]);
+}
+}