# Corrected version.

# Purpose: compute the greatest common divisor (GCD) of two numbers.
def main():
    # Inputs: two positive integers (whole numbers) a and b.
    # Outputs: the GCD of a and b
    a = int(input("Please enter a first number: "))
    b = int(input("Please enter another number: "))

    # 1. Repeat as long as b is not zero:
    while b != 0:
        # 1.1. If a > b, then set a <- (a - b)
        if a > b:
            a = a - b
        # 1.2. Otherwise, set b <- (b - a)
        else:
            b = b - a

    # 2. Output a as the answer.
    print("The GCD of your numbers is", a)

main()