C++ credit card validator program for beginners

#credit #card #validation Credit card validator program written in C Luhn Algorithm -------------- 1. Double every second digit from right to left If doubled number is 2 digits, split them 2. Add all single digits from step 1 3. Add all odd numbered digits from right to left 4. Sum results from steps 2 & 3 5. If step 4 is divisible by 10, # is valid