Run and Test

Now, you can try and run a test of your program. Take a small subset of your input data, and use it as input for your program to verify your program's execution.
./program < testdata.dat.
If the program successfully runs, you can use a program like ``time'' to test optimization settings:

• Run the program, with time ./program < testdata.dat
• Recompile the program, with new optimization settings.
• Re-run the program, with ``time'', to see if the optimization settings improved execution.

If the program doesn't run, (if it dumps core or otherwise exits irregularly), you can use ``gdb'' or ``ddd'' to debug it.