# quadratic5.py
#    A program that computes the real roots of a quadratic equation.
#    Illustrates exception handling to avoid crash on bad inputs

import math

def main():
    print "This program finds the real solutions to a quadratic\n"

    try:
        a, b, c = input("Please enter the coefficients (a, b, c): ")
        discRoot = math.sqrt(b * b - 4 * a * c)
        root1 = (-b + discRoot) / (2 * a)
        root2 = (-b - discRoot) / (2 * a)
        print "\nThe solutions are:", root1, root2 
    except ValueError:
        print "\nNo real roots"

main()