How do I handle white space in validating user input more effectively in c++?

Question

If I allow user to enter input in the form of method(variable, variable), how do I validate against white space?

For example, "method ( a , b )" should be the same as "method(a,b)" and it should be a valid input. Initially, I thought of removing all the white spaces in the input and validate from there on. However, if the user were to enter an invalid input such as "method ( a b , c )", it would have treated it as valid since it would become "method(ab,c)". So is there a better way to validate against such inputs or should I try to anticipate all the various types of cases that user can enter?

Answer 1

Start writing regular expressions and checking against those.

Answer 2

You are supposed to anticipate all the various types of classes that user an enter

Answer 3

check the input is in correct format then make a trim function that removes extra space?idk