FE-star · irisxr · Nov 2, 2022
diff --git a/.idea/.gitignore b/.idea/.gitignore
diff --git a/.idea/encodings.xml b/.idea/encodings.xml
diff --git a/.idea/exercise2.iml b/.idea/exercise2.iml
diff --git a/.idea/modules.xml b/.idea/modules.xml
diff --git a/.idea/vcs.xml b/.idea/vcs.xml
diff --git a/lib/add.js b/lib/add.js
@@ -1,5 +1,24 @@
-function add() {
-  // 实现该函数
+function add(num1,num2) {
+  let len = Math.max(num1.length,num2.length);
+  let sum = '';
+  let temp = 0;
+  let tempSum=0
+ let len1= num1.padStart(len,'0').split('');
+ let len2 = num2.padStart(len,'0').split('')
+  for(i = len-1;i>=0;i--){
+    tempSum =temp+ Number(len1[i])+Number(len2[i]);
+    if(tempSum>=10){
+      temp = parseInt(tempSum/10);
+      tempSum=tempSum%10
+    }else {
+      temp = 0
+    }
+      sum =tempSum+sum
+    if(i==0&&(Number(len1[0])+Number(len2[0])>=10)){
+       sum= '1'+sum
+    }
+  }
+return sum
 }
 
-module.exports = add
+module.exports = add