From ddc24d3fa1a2af58bb5f63b5296d0e361e052d91 Mon Sep 17 00:00:00 2001
From: hyin08 <jeff.yin2016@gmail.com>
Date: Sun, 21 Aug 2022 00:39:35 +0800
Subject: [PATCH 1/2] =?UTF-8?q?execrise=202=20=E5=A4=A7=E6=95=B0=E7=9B=B8?=
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Content-Type: text/plain; charset=UTF-8
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---
 .github/workflows/node.js.yml | 30 ++++++++++++++++++++++++++++++
 lib/add.js                    | 12 +++++++++++-
 2 files changed, 41 insertions(+), 1 deletion(-)
 create mode 100644 .github/workflows/node.js.yml

diff --git a/.github/workflows/node.js.yml b/.github/workflows/node.js.yml
new file mode 100644
index 0000000..655bf28
--- /dev/null
+++ b/.github/workflows/node.js.yml
@@ -0,0 +1,30 @@
+# This workflow will do a clean installation of node dependencies, cache/restore them, build the source code and run tests across different versions of node
+# For more information see: https://help.github.com/actions/language-and-framework-guides/using-nodejs-with-github-actions
+
+name: Node.js CI
+
+on:
+  push:
+    branches: [ "master" ]
+  pull_request:
+    branches: [ "master" ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [16.x]
+        # See supported Node.js release schedule at https://nodejs.org/en/about/releases/
+
+    steps:
+    - uses: actions/checkout@v3
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v3
+      with:
+        node-version: ${{ matrix.node-version }}
+    - run: yarn
+    # Just run tests once
+    - run: yarn test-once
diff --git a/lib/add.js b/lib/add.js
index 1714b95..74f064e 100644
--- a/lib/add.js
+++ b/lib/add.js
@@ -1,5 +1,15 @@
-function add() {
+function add(num1, num2) {
   // 实现该函数
+  let len1 = num1.length;
+  let len2 = num2.length;
+  let sum = '';
+  let carry = 0;
+  while(len1 || len2 || carry) {
+    let cur = (len1 ? Number(num1.charAt(--len1)) : 0) + (len2 ? Number(num2.charAt(--len2)) : 0) + carry;
+    sum = cur % 10 + sum;
+    carry = Math.floor(cur / 10);
+  }
+  return sum;
 }
 
 module.exports = add
\ No newline at end of file

From 7d550d0f049224ea7f981d6ef2df167f3dc1abfd Mon Sep 17 00:00:00 2001
From: hyin08 <jeff.yin2016@gmail.com>
Date: Sun, 21 Aug 2022 10:08:42 +0800
Subject: [PATCH 2/2] update node.js.yml

---
 .github/workflows/node.js.yml | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/.github/workflows/node.js.yml b/.github/workflows/node.js.yml
index 655bf28..a327bf2 100644
--- a/.github/workflows/node.js.yml
+++ b/.github/workflows/node.js.yml
@@ -26,5 +26,4 @@ jobs:
       with:
         node-version: ${{ matrix.node-version }}
     - run: yarn
-    # Just run tests once
-    - run: yarn test-once
+    - run: yarn test