ch09

ch09/fopen.rs

@@ -0,0 +1,18 @@
+use std::fs::File;
+use std::io::ErrorKind;
+
+fn main() {
+    let greeting_file_result = File::open("hello.txt");    
+    let greeting_file = match greeting_file_result {
+        Ok(file) => file,
+        Err(error) => match error.kind() {
+            ErrorKind::NotFound => match File::create("hello.txt") {
+                Ok(fc) => fc,
+                Err(e) => panic!("Problem creating the file: {e:?}"),
+            },
+            _ => {
+                panic!("Problem opening the file: {error:?}");
+            }
+        },
+    };
+}