#include "stdio.h"
#include "math.h"

int main()
{
    float a, b, c, d, x1, x2;
    printf("Enter a, b, c for the quadratic equation ax^2 + bx + c = 0\n");
    printf("a = "); scanf ("%f", &a);
    printf("b = "); scanf ("%f", &b);
    printf("c = "); scanf ("%f", &c);
    if (a==0)
    {
        x1=-c/b;
        printf("\nThe equation has one root.\nx = %.3f", x1);
    }
    else
    {
        d=b*b-4*a*c;
        if (d<0)
        {
            x1=-b/(2*a);
            x2=(sqrt(-d))/(2*a);
            printf("\nThe equation has two distinct complex roots.\n");
            printf("x1 = %.3f + %.3fi\n", x1, x2);
            printf("x2 = %.3f - %.3fi", x1, x2);
        }
        else if (d==0)
        {
            x1=-b/(2*a);
            printf("\nThe equation has exactly one real root.\nx = %.3f", x1);
        }
        else
        {
            x1=(-b+sqrt(d))/(2*a);
            x2=(-b-sqrt(d))/(2*a);
            printf("\nThe equation has two distinct real roots.\n");
            printf("x1 = %.3f\n", x1);
            printf("x2 = %.3f", x2);
        }
    }
}