java编程： 产生10个 -100到100 之间的随机数，统计这些数字中正数和负数各有多少个

Question

如题所述

Answer 1

package test;

import java.util.Random;

public class randomNum {

public static void main(String[] args) {
checkNumber();
}
private static void checkNumber(){
int arr[] = new int[201];
int i;
for(i=1;i<=100;i++){
arr[i]=i+1;
arr[i+100]=0-(i+1);
}
arr[0]=0;
int plus=0; int negative=0 ;
for(i=0;i<10;i++){
Random r = new Random();
int a = arr[r.nextInt(201)];
System.out.print(a+" ");
if(a>0){
plus++;
}else if(a<0){
negative++;
}
}
System.out.println("");
System.out.println("正数有"+plus+"个");
System.out.println("负数有"+negative+"个");
}
}