\B: The program is started without creating a new window or console, i.e. in the TCC window. Normally, the application is started in its own window. For compatibility with CMD, /B also disables Ctrl-C processing for the program.
The percent sign is used in batch files to represent 命令行参数: %1, %2, …
Two percent signs with any characters in between them are interpreted as a 变量: echo %myvar%
Two percent signs without anything in between (in a batch file) are treated like a 单独的% in a command (not a batch file): %%f