diff --git a/special_calculator.cpp b/special_calculator.cpp
new file mode 100644
index 0000000..06fa170
--- /dev/null
+++ b/special_calculator.cpp
@@ -0,0 +1,7 @@
+#include "special_calculator.h"
+#include <cmath>
+
+int SpecialCalculator::special(int a)
+{
+    return sqrt(a);
+} 
\ No newline at end of file