finish chapter 9

1 files changed, 31 insertions, 0 deletions

diff --git a/rust/theBook/chapter-9-error-handling/guessing-result.rs b/rust/theBook/chapter-9-error-handling/guessing-result.rs
new file mode 100644
index 0000000..9b6e3d2
--- /dev/null
+++ b/rust/theBook/chapter-9-error-handling/guessing-result.rs
@@ -0,0 +1,31 @@
+#[derive(Debug)]
+pub struct Guess {
+    value: i32,
+}
+
+impl Guess {
+    pub fn new(value: i32) -> Guess {
+        if value < 1 || value > 100 {
+            panic!("the value entered should be within the range of 1 and 100");
+        }
+
+        Guess { value } // return Guess value
+    }
+
+    pub fn value(&self) -> i32 {
+        self.value
+    }
+}
+
+fn main() {
+    let m = Guess::new(5);
+
+    // this is not allowed once this
+    // struct is defined in external module.
+    // The structure field is private.
+    let m = Guess {
+        value: 32,
+    };
+
+    println!("{:?}", m);
+}