How to fix alpha- numeric sequence

Question

I make program in this i want enter bank cheque no. So
123a56jk
123a56jq
So first three digit fix to entry decimal no.
And after one character then 2 decimals and... So how to fix and what should I use for this like structure, union, array.....???

But I Compulsury store in sequence if anyone try to wrong entry then program give not valid

Answer 1

Are you trying to check if a user input cheque number in the correct format?
If so, look up regular expression. I've used regex in python and I know it's available in C++, I've just not used it in that language sorry.
or
Use isalpha() and isdigit() as appropriate on individual elements of the string.

Answer 2

Hey.

I'd say this strongly depends on what you are planning on doing with the data. If you need to display them only, store it to a string. If you are to carry out user defined operations (comparison, validation, etc) implement a separate class providing these operation.

Hope this helps. Cheers. C

Answer 3

Tnkew..
But I Compulsury store in sequence if anyone try to wrong entry then program give not valid