下列布尔表达式的值是怎么求出来的？VB问题

VB默认根据字符的内部二进制进行字符串比较。"A"比"0"大。

C="A"

C>"0" And C<"9" Or C>="A" And C<="Z"
等于：True And False Or True And True '字符串比较
等于：False Or True And True '从左至右逻辑运算
等于：True And True '两边都False"或"才False
等于：True '两边都True"与"才Ture

C<="0" And C>="9" Or C>="A" And C<="Z"
等于：False And True Or True And True
等于：False Or True And True
等于：True '中间同上

C>="0" And C<="9" And C>="A" And C<="Z"
等于：True And False And True And True
等于：False And True And True
等于：False '"与"中有False必为False

C>="0" Or C<="9" And C>="A" Or C<="Z"
等于：True Or False And True Or True
等于：True And True Or True
等于：True '全是True不管与或肯定为Tru