java例程练习（数三退一[用数组模拟])

public class ThreeOut { public static void main(String[] args) { boolean[] arr = new boolean[500]; for(int i = 0; i < arr.length; i++) { arr[i] = true; } int leftCount = arr.length; int countNum = 0; int index = 0; while(leftCount > 1) { if(arr[index] == true) { countNum ++; if(countNum == 3) { countNum = 0; arr[index] = false; leftCount --; } } index ++; if(index == arr.length) { index = 0; } } for(int i = 0; i < arr.length; i++) { if(arr[i] == true) { System.out.println(i + 1); } } } }