# This program presents random addition or multiplication
# problems to the user using numbers from 1-12.
# The correct answers are calculated using lambda expressions.

import random

# Asks the user to solve the given number of problems.
# 'operator' is a lambda function to calculate the right answer.
# 'text' is a string to represent the operator, like "*".
def quiz_problems(num_problems, text, operator):
    correct = 0
    for i in range(num_problems):
        x = random.randint(1, 13)
        y = random.randint(1, 13)
        answer = operator(x, y)
        response = int(input(str(x) + text + str(y) + " = "))
        if response == answer:
            print("you got it right")
            correct += 1
        else:
            print("incorrect...the answer was", answer)
    print(correct, "of", num_problems, "correct")
    print()

def main():
    quiz_problems(3, " + ", lambda x, y: x + y)
    quiz_problems(3, " * ", lambda x, y: x * y)

main()