diff --git a/src/main.cpp b/src/main.cpp
index 3b511ee..4389002 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -78,10 +78,10 @@ int main()
 
         while (input_file_stream.getline(buf.data(),MAX_SIZE,'\n'))
         {
-            auto m = lines%=2; //防止溢出
+            lines%=2; //防止溢出
             const auto buf_len = strlen(buf.data());
             const std::string_view suffix("\n"); //设置一个每个DNA序列结尾的字符，这里是以\n换行来结尾
-            if (m == 1){
+            if (lines == 1){
                 // output_file_stream << reverseComplement(buf) << endl;
                 reverseComplement(buf,buf_len);
             }