9.

#include <stdio.h>
int main()
{float x,y,d;printf("请输入点A的坐标:\n",x,y);scanf("%f %f",&x,&y);d=(x-2)*(x-2)+(y-2)*(y-2);if(d==1){printf("on the circular\n");} if(d<1){printf("in the circular\n");}if(d>1){printf("out the circular\n");}
return 0;	
}