From c399e7906e2212b8b479ce1fcde0533ea7345393 Mon Sep 17 00:00:00 2001
From: weilinfox <weilin.king@qq.com>
Date: Thu, 5 Mar 2020 13:46:10 +0800
Subject: [PATCH] fix some bug

---
 worker/bc.py | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/worker/bc.py b/worker/bc.py
index 5648e96..1228be8 100644
--- a/worker/bc.py
+++ b/worker/bc.py
@@ -184,7 +184,10 @@ def bcMain(com):
     com = com.replace("()", "")
     com = com.replace("x", "*")
     com = com.replace("X", "*")
-    
+
+    if (len(com) < 1):
+        return reportErr(1, "这")
+
     #省略乘号的支持
     for i in range(1, len(com)-1, 1):
         if (com[i] == '(' and (com[i-1].isdigit() or com[i-1] == '.' or com[i-1] == '%' or com[i-1] == ')')):
@@ -194,7 +197,7 @@ def bcMain(com):
     #部分情况开头加0
     if (com[0] == '+' or com[0] == '-' or com[0] == '.'):
         com = '0' + com
-    
+
     #print(com)
 
     #表达式合法性