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mainunit 8달 전 0

뭐가 잘못됐는지 잘 모르겠습니다...

#include <stdio.h>
int compare(int x1, int y1, int x2, int y2);


int main(void)
{

    int ct, x1, y1, r1, x2, y2, r2;
    scanf("%d", &ct);
    for(int i=0; i<ct; i++)
    {
      
        scanf("%d %d %d %d %d %d", &x1, &y1, &r1, &x2, &y2, &r2);
        if(x1==x2 & y1==y2)
        {
            if((r1-r2)==0)
                printf("-1\n");
            
            else
                printf("0\n");
        }
        
        else
        {
            if(compare(x1, y1, x2, y2)<(r1-r2)*(r1-r2))
            printf("0\n");

            else if(compare(x1, y1, x2, y2)==(r1+r2)*(r1+r2))
            printf("1\n"); 
            
            else if(compare(x1, y1, x2, y2)<(r1+r2)*(r1+r2))
            printf("2\n");
            
            else
            printf("0\n"); 
        }
    }

    return 0;
}

int compare(int x1, int y1, int x2, int y2)
{
    int result;
    result = (x1-x2)*(x1-x2)+(y1-y2)*(y1-y2);
    return result;
}