Write a Python function solvequadratic(a, b, c) that returns the solution(s) of the quadratic equation a*x**2 + b*x + c = 0.

Use the discriminant d = b**2-4*a*c to determine whether there are 0, 1, or 2 real roots. Use the Python has a built-in complex() function to return the complex roots.

The program must prompt user inputs a,b,c and print the roots