bare3 0-2

examples/bare3.rs

@@ -18,25 +18,25 @@ use cortex_m_semihosting::{hprint, hprintln};
 #[entry]
 fn main() -> ! {
     hprintln!("bare3").unwrap();
-    let s = "ABCD";
-    let bs = s.as_bytes();
+    let s: &str = "ABCD";
+    let bs: &[u8] = s.as_bytes();
 
     hprintln!("s = {}", s).unwrap();
     hprintln!("bs = {:?}", bs).unwrap();
 
     hprintln!("iterate over slice").unwrap();
     for c in bs {
-        hprint!("{},", c).unwrap();
+        hprint!("{},", c as &u8).unwrap();
     }
 
     hprintln!("iterate iterate using (raw) indexing").unwrap();
-    for i in 0..s.len() {
+    for i in 0usize..s.len() {
         hprintln!("{},", bs[i]).unwrap();
     }
 
     hprintln!("").unwrap();
 
-    let a = [65u8; 4];
+    let a: [u8; 4] = [65u8; 4];
     // let mut a = [0u8; 4];
 
     hprintln!("").unwrap();
@@ -54,27 +54,37 @@ fn main() -> ! {
 //
 // 1. What is the output in the `openocd` (Adapter Output) console?
 //
-//    ** your answer here **
+// s = ABCD
+// bs = [65, 66, 67, 68]
+// iterate over slice
+// 65,66,67,68,iterate iterate using (raw) indexing
+// 65,
+// 66,
+// 67,
+// 68,
+
+
+// a = AAAA
 //
 //    What is the type of `s`?
 //
-//    ** your answer here **
+//    &str
 //
 //    What is the type of `bs`?
 //
-//    ** your answer here **
+//    &[u8]
 //
 //    What is the type of `c`?
 //
-//    ** your answer here **
+//    &u8
 //
 //    What is the type of `a`?
 //
-//    ** your answer here **
+//    [u8; 4]
 //
 //    What is the type of `i`?
 //
-//    ** your answer here **
+//    usize
 //
 //    Commit your answers (bare3_1)
 //