#include<stdio.h>

typedef struct{
        int x;
        int y;
}       point;

typedef struct{
        point UL;
        point DR;
} box;

int onko_sisalla(const box *loota, const point *piste)
/* Palauttaa 0 jos sis„ll„ */
{
   if (loota->UL.x <= piste->x && piste->x <= loota->DR.x  &&
       loota->UL.y <= piste->y && piste->y <= loota->DR.y ) return 0;
   return 1;
}

int main(void){
    box bx= { {20,20},{40,40} };
    point p = {21,19};
    if (onko_sisalla (&bx,&p)) printf("On sisalla");
    return 0;
}