#include <stdio.h>

struct _Perception
{
　　struct Point{ int x; int y; };

　　Point trackingPoint0;
　　Point trackingPoint1;
　　Point trackingPoint2;
};

_Perception Perception;

int main()
{
　　printf("%d", Perception.trackingPoint0.x);
　　/* ...*/
　　return 0;
}