APP003.TXT  TestPoint Application Note


APP003.TST  Associated Source File 


(c) Capital Equipment Corporation 1995





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Variable File Names


or "Can I create multiple files and assign them names within 


my application?


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Opening, writing and reading multiple files where the file names 


are dependent on the test data, a loop count, or a user input is 


a common requirement.  TestPoint handles this easily. 





This example uses four objects - a data entry field, a single 


file object to control multiple files,  a math object to do 


string concatenation and a loop to determine the number of files 


created and the file name suffix. 





Drag a data entry field and then a file object to the panel. 


Drag the file object to the Action List three times,  selecting 


"Set filename of"  then "Output to" and finally "Close". 





Select a math object and set the formula equal to "initial & 


count".  The "&" operator is used to concatenate a string 


variable which will be the suffix of the file name.  An initial 


file name can be provided in the data entry object for 


convenience and to act an example for the type of information 


required. Drag the math object to the top of the Action List and 


select calculate.  Drag the data entry object to the initial= 


box. 





Select a loop object and drag it to the top of the Action List.  


Drag the end of the loop to the bottom of the Action List.  Drag 


the loop name Loop1 to the variable which will set the suffix of 


the file name in line 2.  Drag the math object from line 2 to 


line 3 so that the result of the calculation will become the new 


file name. 





Enter or drag some data to line 4 for output to your files and 


you're done!   The number of files generated and their names 


will be based on the number of the loop count.  Refer to the 


TestPoint source file to see the completed application.