Updated and function for main and sum tests

Add build script

build

@@ -0,0 +1,14 @@
+#!/bin/bash
+
+echo "build wasm pack..."
+wasm-pack build
+
+if [ $? -eq 0 ]
+then
+  echo -e "\e[32mBuild successfully!"
+else
+  echo -e "\e[31mBuild failed for wasm-pack into script!" >&2
+  exit 1
+fi
+
+echo -e "\e[39m"

src/lib.rs

@@ -3,6 +3,7 @@ use wasm_bindgen::prelude::*;
 extern crate web_sys;
 
 mod utils;
+mod main;
 
 // When the `wee_alloc` feature is enabled, use `wee_alloc` as the global
 // allocator.
@@ -20,11 +21,23 @@ extern {
     fn alert(s: &str);
 }
 
+#[wasm_bindgen]
+extern {
+    fn sum(a: i32, b: i32) -> i32;
+}
+
 #[wasm_bindgen]
 pub fn greet() {
     alert("Hey, CUBETIQ Solution!");
 }
 
+#[wasm_bindgen]
+pub fn just_sum() -> i32 {
+    let sum = sum(100, 50);
+    log(&format!("Just Sum {} + {} = {}", 100, 50, sum));
+    return sum;
+}
+
 #[wasm_bindgen]
 pub fn log(s: &str) {
     web_sys::console::log_1(&s.into());

src/main.rs

@@ -0,0 +1,11 @@
+fn main() {
+    let a = 10;
+    let b = 5;
+    let sum = sum(a, b);
+
+    println!("Sum of {} + {} = {}", a, b, sum);
+}
+
+pub fn sum(a: i32, b: i32) -> i32 {
+    a + b
+}