import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner scan = new Scanner(System.in); //牛牛的坐标 int x = scan.nextInt(); int y = scan.nextInt(); //金币的坐标 int x1 = scan.nextInt(); int y1 = scan.nextInt(); Coor coor = new Coor(); coor.c(x, y, x1, y1); } } class Coor...