diff --git a/version0.5/ebnf.cpp b/version0.5/ebnf.cpp
deleted file mode 100644
index 9632073..0000000
--- a/version0.5/ebnf.cpp
+++ /dev/null
@@ -1,77 +0,0 @@
-//
-//definition:
-//var e=1;
-//var e=e;
-//var e=e[0];
-//var e=e[i];
-//var e=e.e;
-//var e=e[func()];
-//var e=func();
-//	identifier
-//	scalar
-//	call_func -> identifier    func_name()
-//	array_search -> identifier e[0] e[e]
-//	hash_search -> identifier  e.e
-
-<1><scalar> ::=
-	<number> //NUMBER
-	<string> //STRING
-	<!> <identifier>|<scalar>
-	<identifier>|<scalar> <+>|<->|<*>|</>|<~>|<and>|<or>|<==>|<!=>|<<>|<<=>|<>>|<>=> <identifier>|<scalar>
-	<(> <identifier>|<scalar> <)> // find a way to distinguish while(scalar) with real (scalar+-scalar)*scalar
-<2><scalars> ::=
-	<scalar>|<scalars>         <,> <scalar>|<identifier>
-	<identifier>|<identifiers> <,> <scalar>
-<3><identifier> ::=
-	<identifier> // IDENTIFIER
-	<identifier> <[> <identifier>|<scalar> <]> //__array_search
-	<identifier> <.> <identifier> //__hash_search
-	<identifier> <(> <identifier>|<identifiers>|<scalar>|<scalars> <)> //__call_func
-	<identifier> <(><)> //__call_func_null
-<4><identifiers> ::=
-	<identifier>|<identifiers>  <,> <identifier>
-<5><hash_member> ::=
-	<identifier> <:> <identifier>|<scalar>|<__func>
-	<identifier> <:> <func> <(><)> <{><}>
-	<identifier> <:> <func> <(> <identifier>|<identifiers> <)> <{><}>
-	<identifier> <:> <func> <(><)> <{> <statement>|<statements> <}>
-	<identifier> <:> <func> <(> <identifier>|<identifiers> <)> <{> <statement>|<statements> <}>
-<6><hash_members> ::=
-	<hash_member>|<hash_members> <,> <hash_member>
-<7><definition> ::=
-	<var> <identifier> <=> <identifier>|<scalar> <;>
-	<var> <identifier> <=> <[><]> <;>
-	<var> <identifier> <=> <{><}> <;>
-	<var> <identifier> <=> <[> <scalar>|<scalars>|<identifier>|<identifiers> <]> <;>
-	<var> <identifier> <=> <{> <hash_member>|<hash_members> <}> <;>
-<8><assignment> ::=
-	<identifier> <=> <identifier>|<scalar> <;>
-	<identifier> <=> <[><]> <;>
-	<identifier> <=> <{><}> <;>
-	<identifier> <=> <[> <scalar>|<scalars>|<identifier>|<identifiers> <]> <;>
-	<identifier> <=> <{> <hash_member>|<hash_members> <}> <;>
-<9><__func> ::=
-	<var> <identifier> <=> <func> <(><)> <{><}>
-	<var> <identifier> <=> <func> <(> <identifier>|<identifiers> <)> <{><}>
-	<var> <identifier> <=> <func> <(><)> <{> <statement>|<statements> <}>
-	<var> <identifier> <=> <func> <(> <identifier>|<identifiers> <)> <{> <statement>|<statements> <}>
-<10><loop> ::=
-	<while> <scalar> <statement>
-	<while> <scalar> <{> <statement>|<statements> <}>
-	<foreach>|<forindex> <(> <statement> <identifier> <)> <statement>
-	<foreach>|<forindex> <(> <statement> <identifier> <{> <statement>|<statements> <}>
-	<for> <(> <statements> <identifier> <+=>|<-=>|<*=>|</=>|<~=>|<=> <scalar> <)> <statement>
-	<for> <(> <statements> <identifier> <+=>|<-=>|<*=>|</=>|<~=>|<=> <scalar> <)> <{> <statement>|<statements> <}>
-<11><choose> ::=
-	<if>|<elsif> <scalar> <{> <statement>|<statements> <}>
-	<if>|<elsif> <scalar> <statement>
-	<else> <if> <scalar> <{> <statement>|<statements> <}>
-	<else> <if> <scalar> <statement>
-	<else> <{> <statement>|<statements> <}>
-	<else> <statement>
-<12><statement> ::=
-	<definition>|<assignment>|<__func>|<loop>|<choose>
-	<identifier>|<continue>|<break>|<scalar> <;>
-	<return> <identifier>|<scalar> <;>
-<13><statements> ::=
-	<statement>|<statements> <statement>