函数和标签的使用

实例1：

@echo off

echo the name of the bat file is %0

echo the first vars of the bat file is %1

call:function1

call:function2

call:function2

call:function3

call:function4 robin

goto LabelEnd

echo this should not be seen

:LabelEnd

exit /b 0

:function1

echo:1

exit /b 0

:function2

echo:2

exit /b 0

:function3

echo:3

exit /b 0

:function4

echo: 函数名是%0

echo:the first vars of function is %1

exit /b 0

注意1：exit的使用。

Quits the CMD.EXE program (command interpreter) or the current batchscript.

EXIT [/B] [exitCode]

/B specifies to exit the current batch script instead of

CMD.EXE. If executed from outside a batch script, it

will quit CMD.EXE

exitCode specifies a numeric number. if /B is specified, sets

ERRORLEVEL that number. If quitting CMD.EXE, sets the process

exit code with that number.

exitCode可以通过系统变量ERRORLEVEL取得

注意2：函数和标签的定义一样， 只是调用方式不一样。函数用call:+函数名的形式，比如call:function1。

标签使用goto LabelEnd的形式。函数还有可以 传递参数比如：call:function4 robin，而标签不行。

函数调用有 返回值，而标签没有。