diff --git a/rustbyexample/0122/src/main.rs b/rustbyexample/0122/src/main.rs
index 6d3e2f8..c0009fd 100644
--- a/rustbyexample/0122/src/main.rs
+++ b/rustbyexample/0122/src/main.rs
@@ -21,6 +21,18 @@ impl fmt::Display for Point2 {
     }
 }
 
+#[derive(Debug)]
+struct Complex {
+    real: f64,
+    imag: f64,
+}
+
+impl fmt::Display for Complex {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "real: {}, imag: {}", self.real, self.imag)
+    }
+}
+
 fn main() {
     let minmax = MinMax(0, 14);
 
@@ -40,4 +52,10 @@ fn main() {
     println!("Compare points:");
     println!("Display: {}", point);
     println!("Debug: {:?}", point);
+
+    let compl = Complex { real: 3.3, imag: 7.2 };
+
+    println!("Compare complex:");
+    println!("Display: {}", compl);
+    println!("Debug: {:?}", compl);
 }
diff --git a/rustbyexample/0122/src/structure.rs b/rustbyexample/0122/src/structure.rs
deleted file mode 100644
index 5602401..0000000
--- a/rustbyexample/0122/src/structure.rs
+++ /dev/null
@@ -1,9 +0,0 @@
-use std::fmt;
-
-struct Structure(i32);
-
-impl fmt::Display for Structure {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        write!(f, "{}", self.0);
-    }
-}