1-100随机抽取十个数存入数组中，遍历数组，求总和，平均数和小于平均数的个数package aa;import java.util.Random;public class demo { public static void main(String[] args) { int []a=new int[10]; Random r=new Random(); for (int i = 0; i < 10; i++) { int x=r.nextInt(100)+1; a[i]=x; System.out.println(a[i]); } int sum=0; for (int i = 0; i < 10; i++) { sum+=a[i]; } System.out.println("数据之和为："+sum); double avg=0; avg=sum/10; System.out.println("数据平均数为："+avg); int s=0; for (int i = 0; i <10; i++) { if(a[i]<avg) s++; } System.out.println(s+"个数据比平均值小"); }}