Updated projects/data_types'.

projects/data_types/src/main.rs

@@ -2,6 +2,8 @@ fn main() {
     let c = 'z';
     let z: char = 'ℤ'; // 带有显式的类型注解
     let heart_eyed_cat = '😻';
+    let a: [i32; 5] = [-1, 0, 1, 2, 3];
 
     println! ("c 为 {c}, z 为 {z}, 爱心猫{heart_eyed_cat}");
+    println! ("a 为 {:#?}", a);
 }