[C] Sprawdzanie kół

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


struct Circle
{
    char name;
    double radius;
    double x;
    double y;
    struct Circle *next;
};


void addCircles(struct Circle **headPointer)
{
    int choose;
    struct Circle *pointer;

    pointer = *headPointer;

    printf("1. Dodaj kolo\n");
    printf("2. Zakoncz dodawanie\n");
    scanf("%d", &choose);
    while (choose == 1)
    {
        if (pointer == NULL)
        {
            pointer = (struct Circle*)malloc(sizeof(struct Circle));
            pointer->next = NULL;

            printf("\nWprowadz nazwe (1 znak): ");
            scanf(" %c", &(pointer->name));
            printf("\nWprowadz wsporzedna X: ");
            scanf("%lf", &(pointer->x));
            printf("\nWprowadz wsporzedna Y: ");
            scanf("%lf", &(pointer->y));
            printf("\nWprowadz promien: ");
            scanf("%lf", &(pointer->radius));
            *headPointer = pointer;
        }
        else
        {
            while (pointer->next != NULL)
            {
                pointer = pointer->next;
            }
            pointer->next = (struct Circle*)malloc(sizeof(struct Circle));
            pointer = pointer->next;
            pointer->next = NULL;

            printf("\nWprowadz nazwe (1 znak): ");
            scanf(" %c", &(pointer->name));
            printf("\nWprowadz wsporzedna X: ");
            scanf("%lf", &(pointer->x));
            printf("\nWprowadz wsporzedna Y: ");
            scanf("%lf", &(pointer->y));
            printf("\nWprowadz promien: ");
            scanf("%lf", &(pointer->radius));
        }
        printf("1. Dodaj kolo\n");
        printf("2. Zakoncz dodawanie\n");
        scanf("%d", &choose);
    }
}


int checkCirclesAmount(struct Circle *head)
{
    int circlesAmount;
    circlesAmount = 0;

    if(head != NULL)
    {
        circlesAmount = 1;
        while(head->next != NULL)
        {
            head = head->next;
            circlesAmount++;
        }
    }
    return circlesAmount;
}


int **checkCircles(struct Circle *head)
{
    int circlesAmount, i, j;
    struct Circle *pointer, *pointer2;
    int **checkArray;


    pointer = head;
    circlesAmount = checkCirclesAmount(head);

    checkArray = (int **)malloc(sizeof(int*)*(circlesAmount-1));
    j = circlesAmount - 1;
    for(i = 0; i < (circlesAmount - 1); i++)
    {
        checkArray[i] = (int*)malloc(sizeof(int)*j);
        j--;
    }

    pointer = head;
    pointer2 = head;
    for (i = 0; i < (circlesAmount - 1); i++)
    {
        for(j = 0; j < (circlesAmount - 1 - i); j++)
        {
            double distance;

            pointer2 = pointer2->next;
            distance = sqrt((pointer->x - pointer2->x)*(pointer->x - pointer2->x) + (pointer->y - pointer2->y)*(pointer->y - pointer2->y));

            if (distance <= pointer->radius + pointer2->radius)
            {
                checkArray[i][j] = 1;
            }
            else
            {
                checkArray[i][j] = 0;
            }
        }
        pointer = pointer->next;
        pointer2 = pointer;
    }

    return checkArray;
}


int main()
{
    struct Circle *head;
    int **checkArray;
    int i, j, circlesAmount;

    head = NULL;

    addCircles(&head);

    checkArray = checkCircles(head);


    circlesAmount = checkCirclesAmount(head);
    for (i = 0; i < (circlesAmount - 1); i++)
    {
        for (j = 0; j < (circlesAmount - 1 - i); j++)
        {
            if(checkArray[i][j])
            {
                printf("tak  ");
            }
            else
            {
                printf("nie  ");

            }
        }
        printf("\n");
    }

    return 0;
}