Kruznica preseci

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

int start(float x, float y){
    if(x == 0 && y == 0) return -3; /// Koordinaten pocetok
    if(x == 0) return -2;           /// y - oska
    if(y == 0) return -1;           /// x - oska
                                    ///
    if(x > 0 && y > 0) return 1;    /// I Kvadrant
    if(x < 0 && y > 0) return 2;    /// II Kvadrant
    if(x < 0 && y < 0) return 3;    /// III Kvadrant
    if(x > 0 && y < 0) return 4;    /// IV Kvadrant

    return 0;
}

/// Dali ima presek so x - oska
int checkx(float y, float r){
    if(y < 0.0) y *= -1;
    return (r) > (y);
}

/// Dali ima presek so y - oska
int checky(float x, float r){
    if(x < 0.0) x *= -1;
    return (r) > (x);
}

/// Proverka za dali stiga do sprotiven kvadrant
int checkSpro(float x, float y, float r){
    return r > sqrt(x*x + y*y);
}

int main()
{
    double x, y, r;
    scanf("%lf %lf %lf", &x, &y, &r);
    int pos = start(x, y);

    switch(pos){
        case -3: /// Koordinaten pocetok
            r > 0? printf("1111") : printf("0000");
            break;

        case -2: /// y - oska
            if(r == 0) printf("0000");
            else{
                if(y < 0){
                    if(y*(-1.0) >= r) printf("00");
                    else printf("11");

                    printf("11");
                }
                else{
                    printf("11");

                    if(y >= r) printf("00");
                    else printf("11");
                }
            }
            break;

        case -1: /// x - oska
            if(r == 0) printf("0000");
            else{
                int niza[4] = {0,0,0,0};

                if(x < 0){
                    if(x*(-1.0) >= r) niza[0] = niza[3] = 0;
                    else niza[0] = niza[3] = 1;

                    niza[1] = niza[2] = 1;
                }
                else{
                    niza[0] = niza[3] = 1;

                    if(x >= r) niza[1] = niza[2] = 0;
                    else niza[1] = niza[2] = 1;
                }

                for(int i = 0; i < 4; i++)
                    printf("%d", niza[i]);
            }
            break;

        case 1: /// I Kvadrant
            printf("1");
            printf("%d", checky(x,r));
            printf("%d", checkSpro(x,y,r));
            printf("%d", checkx(y,r));
            break;

        case 2: /// II Kvadrant
            printf("%d", checky(x,r));
            printf("1");
            printf("%d", checkx(y,r));
            printf("%d", checkSpro(x,y,r));
            break;

        case 3: /// III Kvadrant
            printf("%d", checkSpro(x,y,r));
            printf("%d", checkx(y,r));
            printf("1");
            printf("%d", checky(x,r));
            break;

        case 4: /// IV Kvadrant
            printf("%d", checkx(y,r));
            printf("%d", checkSpro(x,y,r));
            printf("%d", checky(x,r));
            printf("1");
            break;
    }
    return 0;
}