Using Parser to send files to program in Netbeans

Using Parser to send files to program in Netbeans

I'm building a simple C++ program for exercise. One of the hints is to
have multiple test cases using test files.
I am told to use parser to "pipe" my txt files to my program. for example,
if i wrote testCase.txt. I would type Parser < testCase.txt.
However, it doesn't seem to work. I know that I can program my software to
read a test file but I was wondering if Parser