Selected pta function questions and answers

Exercise 8.4 Reporting numbers

The counting game is like this: n people sit in a circle and number the numbers from 1 to n in order. Counting starts from the first person, and the person who reports m (<n) exits the circle; the next person starts counting from 1, and the person who reports m exits the circle. Continue like this until the last person is left.

This question requires writing a function to give each person's exit sequence number.

Function interface definition:

void CountOff( int n, int m, int out[] );

where nis the initial number of people; mis the exit position specified by the game (guaranteed to be a positive integer less than n). The function CountOffstores each person's exit sequence number out[]in an array. Because the C language array subscript starts from 0, ithe person at the th position is the first out[i-1]to exit.

Sample Referee Test Procedure:

#include <stdio.h>
#define MAXN 20

void CountOff( int n, int m, int out[] );

int main()
{
    int out[MAXN], n, m;
    int i;

    scanf("%d %d", &n, &m);
    CountOff( n, m, out );   
    for ( i = 0; i < n; i++ )
        printf("%d ", out[i]);
    printf("\n");

    return 0;
}

/* 你的代码将被嵌在这里 */

Input example:

11 3

Output sample:

4 10 1 7 5 2 11 9 3 6 8 

Implementation code:

void CountOff( int n, int m, int out[] )
{
    int a[MAXN],i,k=0,count=n,j=0;
    for(i=0;i<n;i++)    //给每个位置赋初值
    {
        a[i]= i;
    }
    for(;count!=0;i++)
    {
        if(a[i%n]!=-1)//-1表示已经退出，
        {
        k++;//报数+1
        if(k==m)//报数满足条件m
        {
        out[i%n]=n-count+1;//给对