大家 帮小弟我看看 QBasic 语句 为什么会出错

大家 帮我看看 QBasic 语句 为什么会出错
DIM   s   AS   STRING
s   =   "HI "

PRINT   s
DIM   v   AS   INTEGER
PRINT   v   +   56   +   87

FOR   v   =   0   TO   12
PRINT   v
NEXT   v
  DIM   aa   AS   STRING
    aa   =   "111 "   &   cstr(v)

  PRINT   aa

说这句出错   :
aa   =   "111 "   &   cstr(v)



[解决办法]
aa = "111 " & str$(v)