Write a program to read in values of a, b and c and calculate the real roots of the corresponding quadratic equation:
Point out if the equation only has one or no real roots.
The program should repeatedly expect input; a = 0, b = 0 and c = 0 should be used to terminte.
Hint 1: recall that the solution of a general quadratic equation equation is:
Hint 2: The program has a single root if
