1) Create an enumerated data type called CrdCard

The types of Credit Cards to create are American Express, Visa, MasterCard, Discover, and ALL

The ALL just means could be any of the 4 specified.

2) Create a function that takes in the enumerated type and returns a valid credit card number using the Luhn Algorithm. Note: Length, etc... are dependent on credit card type.

void genCC(CrdCard,char []), or

char *genCC(CrdCard)

3) Create a function that randomly flips only 1 digit.

void flipDig(char []);

4) Create a function that determines if the result is a valid Credit Card

bool validCC(char[]);

5) Loop 10,000 times and record how many valid vs. invalid Credit Cards are detected.