Find the roots of a quadratic equation.

#include <math.h>
#include <stdio.h>

void main() {

    double a, b, c, d, root1, root2, realPart, imagPart;

    printf("Enter coefficients a, b and c: ");
    scanf("%lf %lf %lf", &a, &b, &c);

    d = b * b - 4 * a * c;

    if (d > 0)
    {
        root1 = (-b + sqrt(d)) / (2 * a);
        root2 = (-b - sqrt(d)) / (2 * a);
        printf("root1 = %.2lf and root2 = %.2lf", root1, root2);
    }
    else if (d == 0)
    {
        root1 = root2 = -b / (2 * a);
        printf("root1 = root2 = %.2lf;", root1);
    }
    else
    {
        realPart = -b / (2 * a);
        imagPart = sqrt(-d) / (2 * a);
        printf("root1 = %.2lf+%.2lfi and root2 = %.2f-%.2fi", realPart, imagPart, realPart, imagPart);
    }
}