Update a few examples.

Cargo.lock

@@ -610,6 +610,10 @@ dependencies = [
  "unicode-segmentation 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "hello_world"
+version = "0.1.0"
+
 [[package]]
 name = "hex"
 version = "0.3.2"

Cargo.toml

@@ -58,7 +58,8 @@ members = [
     "lib/wasi-tests",
     "lib/emscripten-tests",
     "lib/middleware-common-tests",
-    "examples/plugin-for-example"
+    "examples/plugin-for-example",
+    "examples/hello_world"
 ]
 
 [build-dependencies]

examples/hello_world/Cargo.toml

@@ -0,0 +1,9 @@
+[package]
+name = "hello_world"
+version = "0.1.0"
+authors = ["losfair <zhy20000919@hotmail.com>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

examples/hello_world/src/main.rs

@@ -0,0 +1,7 @@
+fn main() {
+    for i in 0..8 {
+        let s = format!("Hello, {}", i);
+        println!("{}", s);
+    }
+    panic!("OK");
+}

examples/iterative_hash/src/main.rs

@@ -20,7 +20,7 @@ fn main() {
             let diff = millis - last_millis;
             if diff >= 100 {
                 record_count += 1;
-                println!("{}", (i - round_count) as f64 / diff as f64);
+                println!("{}", ((i - round_count) as u128) * 1000000 / diff );
                 last_millis = millis;
                 round_count = i;
             }