change input parameters

Author: Fei Yang

source/source_io/read_input_item_relax.cpp

@@ -14,24 +14,26 @@ void ReadInput::item_relax()
         item.annotation = "cg; bfgs; sd; cg; cg_bfgs;";
         read_sync_string(input.relax_method);
         item.read_value = [](const Input_Item& item, Parameter& para) {
-            para.input.relax_method_param.method=item.str_values[0];
-            para.input.relax_method = para.input.relax_method_param.method;
         if(item.get_size()==1)
         {
+            para.input.relax_method_param.method=item.str_values[0];
+            para.input.relax_method = para.input.relax_method_param.method;
             para.input.relax_method_param.param = "1"; 
         }
-        else
+        else if(item.get_size()==2)
         {
+            para.input.relax_method_param.method=item.str_values[0];
+            para.input.relax_method = para.input.relax_method_param.method;
             para.input.relax_method_param.param = item.str_values[1]; 
         }
+        };
 
         // std::istringstream iss(item.str_values[0]);
         // iss >> para.input.relax_method_param.method;
         // if (!(iss >> para.input.relax_method_param.param)) {
         //     std::cout << "No parameter provided for relax_method_param.param, default to 1" << std::endl;
         // para.input.relax_method_param.param = "1";        
         // }
-        };
         item.check_value = [](const Input_Item& item, const Parameter& para) {
         const std::vector<std::string> relax_methods = {"cg", "sd", "cg_bfgs","bfgs","lbfgs"};
         if (std::find(relax_methods.begin(), relax_methods.end(), para.input.relax_method_param.method) == relax_methods.end()) {