I got the result right!

src/cminusfc/cminusf_builder.cpp

@@ -182,8 +182,29 @@ void CminusfBuilder::visit(ASTVarDeclaration &node) {
                 if (global)
                     cur_value =
                         GlobalVariable::create(node.id, builder->get_module(), FLOAT_T, false, FloatInitializer);
-                else
-                    cur_value = builder->create_alloca(INT32_T);
+                else {
+                    /* Beautiful is better than ugly.
+                     * Explicit is better than implicit.
+                     * Simple is better than complex.
+                     * Complex is better than complicated.
+                     * Flat is better than nested.
+                     * Sparse is better than dense.
+                     * Readability counts.
+                     * Special cases aren't special enough to break the rules.
+                     * Although practicality beats purity.
+                     * Errors should never pass silently.
+                     * Unless explicitly silenced.
+                     * In the face of ambiguity, refuse the temptation to guess.
+                     * There should be one-- and preferably only one --obvious way to do it.
+                     * Although that way may not be obvious at first unless you're Dutch.
+                     * Now is better than never.
+                     * Although never is often better than *right* now.
+                     * If the implementation is hard to explain, it's a bad idea.
+                     * If the implementation is easy to explain, it may be a good idea.
+                     * Namespaces are one honking great idea -- let's do more of those! */
+                    // cur_value = builder->create_alloca(INT32_T);
+                    cur_value = builder->create_alloca(FLOAT_T);
+                }
                 break;
             default:
                 error_exit("Variable type(not array) is not int or float");
@@ -296,6 +317,7 @@ void CminusfBuilder::visit(ASTCompoundStmt &node) {
      * builder->create_br(bb);
      * builder->set_insert_point(bb); */
     scope.enter();
+
     for (auto &decl : node.local_declarations) {
         decl->accept(*this);
     }
@@ -305,6 +327,7 @@ void CminusfBuilder::visit(ASTCompoundStmt &node) {
         if (builder->get_insert_block()->get_terminator() != nullptr)
             break;
     }
+
     scope.exit();
 }