1代表相切，2代表相离，3代表包含，4代表相交
 帮忙看一下哪里错了，谢谢
#include<stdio.h>
#include<math.h>
int main()
{
    double x1,x2,y1,y2,r1,r2,d;
    while(scanf("%lf%lf%lf%lf%lf%lf",&x1,&y1,&x2,&y2,&r1,&r2)!=EOF)
    {
        d=sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2));
        if(d>r1+r2)
          printf("2\n");
        else if(d==r1+r2||d==fabs(r1-r2))
         printf("1\n");
        else if(d<r1+r2&&d>fabs(r1-r2))
         printf("4\n");
        else
         printf("3\n");
    }
    return 0;
}