nil pointer

常见例句

双语例句

• Normal control characters (characters with values less than 32): This especially includes character 0, traditionally called NUL; I call it NIL to distinguish it from C's NULL pointer.
  常规控制字符（字符值小于32）：还特别包括字符0，传统上称做 NUL；我把它称为 NIL 以区别于 C 语言中的 NULL 指针。
返回 nil pointer