TSANIFIRST

void CalculateTheRoots( float a, float b, float c, float *pd, float *x1, float *x2)
{
    float d = *pd;
    d = b * b - 4 * a * c;
    if (d >= 0)
    {
        *x1 = (- b + sqrt(d) / (2 * a));
        *x2 = (- b - sqrt(d) / (2 * a));
    }
    else
    {
        *x1 = (- b) / (2 * a);
        *x2 = sqrt(d) / (2 * a);
    }
    *pd = d;
}
void TheSolving()
{
    float a, float b, float c;
    printf("Please write the coefficients: \n");
    scanf("%f %f %f", &a, &b, &c); //coefficients
    float pd, x1, x2; // discriminant and roots
    if (a == 0)
    {
        printf("It's not a quadratic equation\n");
    }
    else
    {
        CalculateTheRoots(a,b,c, *pd, *x1, *x2);
        printf("Discriminant is %f\n", pd);
        printf("Vertex: x = %f, y = %f", (- b / (2 * a)), (- pd / (4 * a)));
        if ( d == 0 )
            printf("The root is %f\n", x1);
        else if (d > 0)
            printf("The roots are %f and %f\n", x1, x2);
        else
            printf("The roots are complex and equals %f +- %f\n" , x1, x2);
    }

}
int main()
{
    TheSolving();
    return 0;
}