package cn.edu.cwnu.ll16;
import java.util.Random;
import java.util.Scanner;
public class RadomCall {
public static void main(String[] args) {
System.out.println("-------随机点名器-------");
int total,enterNegative,index;
Scanner sc = new Scanner(System.in);
//对学生总数的输入作判断
do {
System.out.println("学生总数:");
total=sc.nextInt();
}
while(total<=0);
// 创建一个存储多个同学姓名的数组
String[] students = new String[total];
//创建一个存储点过名的同学姓名在姓名数组
int[] calledStudents = new int[total+1];
//输入学生姓名
for (int i = 0; i < students.length; i++) {
System.out.println("存储第"+(i+1)+"个学生姓名:");
students[i] = sc.next();
}
//遍历数组,得到每个同学姓名
for(int i = 0; i < students.length; i++) {
String name = students[i];
//打印姓名
System.out.println("第" + (i+1)+ "个学生姓名为:" + name);
}
//重复点名
do {
//对人数合法性作普判断
System.out.println("输入要点名的人数:");
int number=sc.nextInt();
for(int i=1;i<=number;i++) {
if(number<=0) {
System.out.println("放弃点名。");
}
else {
do {
index = new Random().nextInt(students.length);
String name = students[index];
System.out.println("被点到的人为:"+name);
calledStudents[total]++;
}
while(students[calledStudents[total]]!=students[index]);
}
}
//判断是否需要重复点名
System.out.println("是否需要重新点名?(若需要,请输入一个负数)");
enterNegative= sc.nextInt();
}
while (enterNegative<0);
sc.close();
System.out.println("结束点名。");
}
}