Topic Tag: classification into Amex/Visa/Mastercard. Search for: › Forums › Topic Tag: classification into Amex/Visa/Mastercard. Viewing topic 1 (of 1 total) Topic Voices Posts Last Post Unable to print the total of all digits as part of solving credit card problem Started by: admin in: Week 1: [C] – Data Types, Operators, Conditional Statements, Loops, and Command Line 1 1 4 years, 1 month ago admin Viewing topic 1 (of 1 total)