Write a C++ programming code for a non-zero, discuss the roots of the quadratic equation as follows:

a) D =0; the equation has a double solution.

x1 = x2 = -b/2a

b) D>0; the question has two different solutions x1 and x2.

x1= (-b-sqrt(D))/2a

x2= (-b+sqrt(D))/2a

c) if D<0; the equation has no real solution