diff --git a/sort.c b/sort.c
--- a/sort.c
+++ b/sort.c
@@ -103,5 +103,5 @@
     for (i = 0; i < MAX; i++)
         printf ("%2d %2d %2d\n", a[i], b[i], c[i]);
 
-    return 0;
+    return EXIT_SUCCESS;
 }