Update 0002 Solution.js, Organize code structure

Author: Mcnwork2018

solution/0002.Add Two Numbers/Solution.js

@@ -10,27 +10,31 @@
  * @param {ListNode} l2
  * @return {ListNode}
  */
-var addTwoNumbers = function(l1, l2) {
-  var c1 = l1,c2 = l2,c3,l3,carry = 0;
-  while(c1 || c2 || carry){
-      var v1 = 0,v2 = 0;
-      if(c1){
-          v1 = c1.val;
-          c1 = c1.next;
-      }
-      if(c2){
-          v2 = c2.val;
-          c2 = c2.next;
-      }
-      var sum = v1 + v2 + carry;
-      carry = (sum - sum % 10) / 10;
-      if(!c3){
-          l3 = new ListNode(sum%10);
-          c3 = l3;
-      }else{
-          c3.next = new ListNode(sum%10);
-          c3 = c3.next;
-      }
-  }
-  return l3;
+
+/**
+ * Author: Mcnwork2018 
+ */
+var addTwoNumbers = function (l1, l2) {
+	let c1 = l1, c2 = l2,c3 = 0, l3 = 0, carry = 0;
+	while (c1 || c2 || carry) {
+		var v1 = 0, v2 = 0;
+		if (c1) {
+			v1 = c1.val;
+			c1 = c1.next;
+		}
+		if (c2) {
+			v2 = c2.val;
+			c2 = c2.next;
+		}
+		var sum = v1 + v2 + carry;
+		carry = (sum - sum % 10) / 10;
+		if (!c3) {
+			l3 = new ListNode(sum % 10);
+			c3 = l3;
+		} else {
+			c3.next = new ListNode(sum % 10);
+			c3 = c3.next;
+		}
+	}
+	return l3;
 }