多边形重心及面积

#include
#include
#include
using namespace std;
#define INF 0.0000001
const int N=10010;
struct point{
	double x;
	double y;
	point():x(0),y(0){
	}
}p[N];
int main(){
	int t,n;
	scanf("%d",&t);
	while(t--){
		double sum=0;	
		point a; 
		scanf("%d",&n);
	
		for(int i=0;i