/*vti tuuong doi cua m voi duong trona*/

#include<stdio.h>

#include<conio.h>

#include<math.h>

typedef struct

{

float x;

float y;

}diem;

float kc(diem A,diem B)

{

float a;

a=sqrt(pow((A.x-B.x),2)+pow((A.y-B.y),2));

return a;

}

int main()

{

float r;

diem O,M;

printf("nhap toa do diem tam O:");scanf("%f%f",&O.x,&O.y);

printf("nhap toa do diem M: ");scanf("%f%f",&M.x,&M.y);

printf("nhap ban kinh duong tron: ");scanf("%f",&r);

if((kc(O,M)<r)) printf("M nam trong duong tron");

if((kc(O,M)==r)) printf("M nam tren duong tron");

if((kc(O,M)>r)) printf("M nam ngoai duong tron");

getch();

return 0;

}