Update blackjack.cpp

Indeed, on input 3, 0, "simple", gives:

Shuffling the deck
cut at 39
cut at 22
cut at 33
cut at 37
cut at 38
cut at 37
cut at 38
Hand 1 bankroll 100
Player bets 5
Player dealt King of Spades
Dealer dealt Three of Diamonds
Player dealt Six of Diamonds
Player's total is 16
Dealer's hole card is Four of Spades
Dealer dealt Ten of Hearts
Dealer's total is 17
Dealer wins
Hand 2 bankroll 95
Player bets 5
Player dealt King of Hearts
Dealer dealt Ace of Clubs
Player dealt Seven of Hearts
Player's total is 17
Dealer's hole card is Three of Clubs
Dealer dealt Jack of Spades
Dealer dealt Eight of Diamonds
Dealer's total is 22
Dealer busts
Hand 3 bankroll 100
Player bets 5
Player dealt Eight of Clubs
Dealer dealt Two of Spades
Player dealt Nine of Spades
Player's total is 17
Dealer's hole card is Jack of Hearts
Dealer dealt Ten of Diamonds
Dealer's total is 22
Dealer busts
Player has 105 after 3 hands

the correct behavior!