It should be possible to run the program in an interactive mode.
This means that the user is prompted to enter an FDC ID when no FDC ID is found for a food.
When no FDC ID is found in FDC ID field or URL field, ask the user for an FDC ID.
User enters ID (consisting only of numbers
Use this FDC ID to query for nutrients.
When the request was successful automatically enter the FDC ID to the FDC ID field of that food.
When the request was not successful (not found, timed out, ...) inform the user about that and continue with the next food
User does not enter anything and just presses Enter
It should be possible to run the program in an interactive mode. This means that the user is prompted to enter an FDC ID when no FDC ID is found for a food.
When no FDC ID is found in FDC ID field or URL field, ask the user for an FDC ID.