OR_T3_Z1

/* OR_Tutorijal_3 Zadatak_1*/
#include <stdio.h>
#include <math.h>

int main()
{
    float a, b, c;
    float x1_re, x1_im;
    float x2_re, x2_im;
    float t, D;

    printf("Unesite koeficijente kvadratne jednacine: ");
    scanf("%f %f %f", &a, &b, &c);

    D=b*b-4.0f*a*c;
    printf("Rjesenja su: \n");

    if (D>0.0f) {
        t=sqrt(D);

        x1_re=(-b+t)/(2*a);
        x2_re=(-b-t)/(2*a);

        printf(" x1= %f \n", x1_re);
        printf(" x1= %f \n", x2_re);
    }
    else if (D==0.0f) {
        x1_re= -b/(2*a);

        printf(" x1=x2= %f \n", x1_re);
    }
    else {
        t=sqrt(-D);

        x1_re=-b/(2*a);
        x1_im=t/(2*a);

        x2_re=x1_re;
        x2_im=-x1_im;

    printf(" x1 = (%f, %f) \n", x1_re, x1_im);
    printf(" x2 = (%f, %f) \n", x2_re, x2_im);
    }
  return 0;
}