[DavidBilla]

You're checking if the parameter is a string and in the next sscanf line you're checking if it's an integer. It can't be string and integer at the same time.

Use optional parameters

Код:

if(sscanf(params,"s[50]I(-1)", choice,choice2)

Now the second parameter (integer) is optional
If a person uses take order but doesn't give a value for choice2​ , it defaults to -1.
However if they choose a valid number the remaining codes are executed.

Also remove the second sscanf line.