Special tutorial - Captain selection game

Today, the students made an appointment to climb the mountain for fun , In order to better carry out this activity , We are going to recommend A man as a temporary captain of the trip . In order to reflect rationality and fairness , We put forward an interesting The rules . Everyone in a circle , Sequence number . Count from the first person （ from 1 To 3 Number off ）, Where to report 3 Of the people out of the circle , The rest continued to count , The last one left was elected captain . Please write a program , Find out how many students the team leader of a group is .

Ideas ： Investigate the basic grammar knowledge and the flexible use of arrays ;

Think of the team as an array , Step by step analysis

Reasons for stepping on the pit ：1.count++, It's assignment before operation , and ++count confusion ;

 2.index Assignment problem , When count Turn into 0 in the future ,index Same count , therefore index The number of has remained the same , Unwanted --

public class Pashan {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int n = input.nextInt();
        // First define an array , The number of climbers is the length of the array 
        // Consider three variables .
        //1. The length of the array leftNumber, For every player eliminated ,leftNumber-1.
        //2. Count ：index First give all the team members a title 1, Used to count , Every round starts anew .
        //3. Number off ：count, Add one digit for each quotation 1, When you check in 3 Time out , Assign to zero .
        int[]persons = new int[n];
        int leftNumber = persons.length;
        int index = 0;// Count 
        int count = 0;// Number off 
        for (int i= 0;i<persons.length;i++){
            persons[i]=1;// First assign a title to everyone 1
        }
        while (leftNumber>1){// There are more people than 1 The game can be played , Know that one person is eliminated , End the game 
            if (persons[index]==1){
                count++;// Number off 
            }
            if (count==3){// To report for duty 3 Quit the game 
                count=0;// The assignment for exiting the game is 0, The next round will not count off 
                persons[index]=0;// Empathy , The subscript is also assigned to 0
                leftNumber--;// Array length minus 1
            }
            index++;// It's assignment before operation , Do not mix ++count confusion ;
            if (index==n){// A round of counting is over ,
                index=0;// Recount 
                // When count Turn into 0 No counting , but index Same count .
                // therefore index The number of is always the same , Unwanted --
            }
        }
        for (int i= 0;i<persons.length;i++){
            // Don't confuse here ,i Is the value of the subscript ,i+1 Is the value of the count 
            System.out.println(" The captain is the original No "+(i+1)+" A team member ");
        }
    }
}