Added rust "classes" post

content/post/2024-09-21-RustClass.md

@@ -0,0 +1,51 @@
+---
+title: Rust "Classes" -> struct + impl
+subtitle: Learning Rust
+date: 2024-09-21
+tags: [ 
+    "programming", 
+    "code", 
+    "rust",
+] 
+---
+
+## Q: How do I write a class in Rust?
+## A: Use a struct and "impl" some functions.
+</br>
+Following is the code for a very basic struct with accessors and mutators.
+
+```
+struct MyStruct{
+    word: String,
+    number: i32
+}
+
+impl MyStruct{
+    pub fn new(s: String, i: i32) -> MyStruct {
+        return MyStruct{
+            word: s,
+            number: i
+        }
+    }
+    pub fn set_word(&mut self, w: String) { self.word = w; }
+    pub fn set_number(&mut self, n: i32) { self.number = n; }
+    pub fn word(&self) -> String { self.word.to_string() }
+    pub fn number(&self) -> i32 { self.number }
+}
+
+fn main() {
+    let mut m = MyStruct::new("potato".to_string(), 3);
+    println!("{}, {:>5}", m.word(), m.number());
+    println!("{}, {:>5}", m.word(), m.number());
+    m.set_number(1234);
+    m.set_word("Balls".to_string());
+    println!("{}, {:>6}", m.word(), m.number());
+}
+```
+
+Output: 
+```
+potato,     3
+potato,     3
+Balls,   1234
+```