import error

src/daos.rs

@@ -0,0 +1,12 @@
+// file not found for module `modules`
+// help: to create the module `modules`, create file "src\daos\modules.rs" rustc(E0583)
+mod modules;
+
+// failed to resolve: maybe a missing crate `modules`?
+// maybe a missing crate `modules`? rustc(E0433)
+use crate::modules::users::dao::{hello};
+
+pub fn example() {
+    // cannot find function `hello` in this scope
+    hello();
+}

src/main.rs

@@ -1,3 +1,7 @@
+mod daos;
+
+use crate::daos::{example};
+
 fn main() {
-    println!("Hello, world!");
+    example();
 }

src/modules/mod.rs

@@ -0,0 +1 @@
+pub mod users;

src/modules/users/dao.rs

@@ -0,0 +1,3 @@
+pub fn hello() {
+    println!("Hello, world!");
+}

src/modules/users/mod.rs

@@ -0,0 +1 @@
+pub mod dao;