檢視 $SParameterDirectory 的原始碼

<font size=5>'''Format'''</font>
 $SParameterDirectory
  ''filename''                <font color=green>// where ''filename'' is an string.</font>

<font size=3>$SParameterDirectory allows the program to know what the name of the input file 2 is and where it is.</font>


<font size=5>'''Example'''</font>
 $SParameterDirectory
  Sparameter.Sinp

Then the program reads Sparameter.Sinp in the same directory with the program as the input file 2.

or
 $SParameterDirectory
  C:\Users\Documents\FDTD\Sparameter.Sinp

the program reads the input file 2 in C:\Users\Documents\FDTD\Sparameter.Sinp.