How do I convert this to C++ code

#constants declaration
DOWN_PAYMENT_RATE = 0.10
ANNUAL_INTEREST_RATE = 0.12
MONTHLY_PAYMENTS_RATE = 0.05

#prompt the user to enter the purchase price
purchasePrice = float(input("Enter the purchase price: "))

#The month number (beginning with 1)
month = 1

#The payment for that month
payment = purchasePrice * MONTHLY_PAYMENTS_RATE

#The current total balance owed
startingBalance = purchasePrice

#print the table heading
print("\n%s%19s%18s%19s%10s%17s" % ("Month", "Starting Balance", "Interest to Pay",
                                    "Principal to Pay", "Payment", "Ending Balance"))

#repeat the loop as long as the startingBalance is greater than 0
while startingBalance > 0:

    #The interest owed for that month
    interestToPay = startingBalance * ANNUAL_INTEREST_RATE / 12

    #The amount of principal owed for that month
    principalToPay = payment - interestToPay

    #The balance remaining after payment
    endingBalance = startingBalance - payment

    #print the statistics
    print("%2d%16.2f%16.2f%18.2f%18.2f%15.2f" % (month, startingBalance, interestToPay,
                                                 principalToPay, payment,endingBalance))

    #update the starting balance
    startingBalance = endingBalance

    #increment the month by 1
    month = month + 1