Revise paste NCTU LAB 02/04 NUM 1

#include <iostream>
#include <ctime>
#include <cstdlib>
#include <cmath>
using namespace std;

#define dist(x1, y1, x2, y2) sqrt(pow((x2-x1),2)+pow((y2-y1),2))

struct Point{
	int x, y;
}points;

struct pointSet{
	int n;
	Point *pt;
}pSet;

int n, x, y;

void genPoints(pointSet &ps, int n){
	ps.pt = new Point[n];
	srand(time(0));
	for(int i=0;i<n;i++){
		ps.pt[i].x = rand()%201 - 100;
		ps.pt[i].y = rand()%201 - 100;
	}
}

Point match(Point p, pointSet ps){
	int minX, minY;
	double distance = 10e9;
	for(int i=0;i<n;i++){
		if(dist(x, y, ps.pt[i].x, ps.pt[i].y)<distance){
			distance = dist(x, y, ps.pt[i].x, ps.pt[i].y);
			minX = ps.pt[i].x;
			minY = ps.pt[i].y;
		}
	}
	cout << endl;
	printf("The nearest point to (%d,%d) is (%d,%d)\n", x, y, minX, minY);
}

int main(){
	cout << "Input the number of points and the testing point (x,y): " << endl;
	while(cin >> n >> x >> y){
		genPoints(pSet, n);
		cout << "The points are: " << endl;
		for(int i=0;i<n;i++){
			cout << "(" << pSet.pt[i].x << "," << pSet.pt[i].y << ")" << endl;
		}
		match(points, pSet);
		cout << endl;
		cout << "Input the number of points and the testing point (x,y): " << endl;
	}
	return 0;
}