diff --git a/cnumber.hpp b/cnumber.hpp
index ee7b63c..277f228 100644
--- a/cnumber.hpp
+++ b/cnumber.hpp
@@ -9,6 +9,10 @@ class cnumber {
 
 	public:
 		// Constructor
+		cnumber(const cnumber &z) {
+			r = z.r;
+			i = z.i;
+		}
 		cnumber(const fraction &a, const fraction &b) {
 			r = a;
 			i = b;