# Quiz the user on addition and multiplication problems involving integers
# between 1 and 10
from random import randrange

# Create a math question using either + or * and small integers
# Parameters: (None)
# Returns: the left operand, the operator, the right operand and the correct 
#          answer
def createQuestion():
  # Select a random integer
  left = randrange(1, 20 + 1)

  # Select a random operator
  operator = randomOperator()

  # Select another random integer
  right = randrange(1, 20 + 1)

  # Compute the correct result
  if operator == "+":
    correct = left + right
  else:
    correct = left * right

  # Return the complete question and its answer
  return left, operator, right, correct

# Randomly select either "+" or "*" with equal probability
# Parameters: (None)
# Returns: Either "+" or "*"
def randomOperator():
  i = randrange(0, 2)
  if i == 0:
    return "+"
  return "*"

def main():
  num_correct = 0
  # For each question
  for i in range(10):
    # Create a random question
    value1, op, value2, correct = createQuestion()

    # Display the question
    print("What is", value1, op, value2, "?")

    # Read the user's answer
    ans = int(input())

    # Report whether or not the answer is correct
    if ans == correct:
      print("Correct!!!!!!")
      num_correct = num_correct + 1
    else:
      print("Nope.  The correct answer is", correct)

  # Report the user's score out of 10
  print("You answered", num_correct, "questions out of 10 correctly.")

if __name__ == "__main__":
  main()