第43章

varplus='+'

varminus='-'

varmultiply='*'

vardivide='/'

vardecimal='.'

varone='1'

vartwo='2'

varthree='3'

varfour='4'

varfive='5'

functionenter(obj,string)

{obj.expr.value+=string}

functionclear(obj,string)

{obj.expr.value=''}

//-->

varsix='6'

varseven='7'

vareight='8'

varnine='9'

varzero='0'