Kvadratno uravnenie

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


int main()
{
    float a, b, c, d;
    float x1, x2;

    printf("Enter a = ");
    scanf("%g", &a);

    printf("Enter b = ");
    scanf("%g", &b);

    printf("Enter c = ");
    scanf("%g", &c);

    if (a == 0)
    {
        x1 = -c / b;
        printf("Poluchava se lineino uravnenie ot vida \"bx + c = 0\"\n");
        printf("x = %g\n", x1);
    }
    else if (b == 0)
    {
        printf("Nqma reshenie\n");
    }
    else if (c == 0)
    {
        printf("Vsqko X e reshenie\n");
    }
    else
    {
        d = b*b - 4 * a*c;

        if (d < 0)
        {
            printf("Nqma realni koreni\n");
        }
        else if (d == 0)
        {
            x1 = -b / (2 * a);
            printf("x1 = x2 = %g\n", x1);
        }
        else
        {
            x1 = (-b + sqrt(d)) / (2 * a);
            x2 = (-b - sqrt(d)) / (2 * a);

            printf("x1 = %g\n", x1);
            printf("x2 = %g\n", x2);
        }
    }

    system("PAUSE");
    return 0;
}