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Originally posted by z2364003 at 2008-8-9 16:02: 那里有甚而的批处理语名
Two new switches have been added to the SET command: SET /A expression SET /P variable=[promptString] The /A switch specifies that the string to the right of the equal sign is a numerical expression that is evaluated. The expression evaluator is pretty simple and supports the following operations, in decreasing order of precedence: () - grouping ! ~ - - unary operators * / % - arithmetic operators + - - arithmetic operators << >> - logical shift & - bitwise and ^ - bitwise exclusive or | - bitwise or = *= /= %= += -= - assignment &= ^= |= <<= >>= , - expression separator The /P switch allows you to set the value of a variable to a line of input entered by the user. Displays the specified promptString before reading the line of input. The promptString can be empty.