第七周上机作业
1有10个评委打分,(去掉一个最高一个最低)求平均。
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package day01;import java.util.*;public class test3 { public static void main(String[] args) { // TODO Auto-generated method stub Scanner input=new Scanner (System.in); int [] arr= new int [10]; int sum=0; System.out.println("请输入成绩"); for (int i = 0; i < arr.length; i++) { System.out.print(i+1+":"); arr[i]=input.nextInt(); } for (int i = 0; i < arr.length; i++) { for (int j = 0; j < arr.length-i-1; j++) { if(arr[j]>arr[j+1]){ int h=arr[j]; arr[j]=arr[j+1]; arr[j+1]=h; } } } for (int i = 1; i < 9; i++) { sum+=arr[i]; } System.out.println("选手分数平均值为"+sum/8.0); }} |
2.自学一下Java随机数，生成一个长度为10的随机数组（每个数的范围是0~99），排序后输出
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package day01;import java.util.Random;public class yeah { public static void main(String[] args) { // TODO Auto-generated method stub Random r=new Random (); int []arr=new int [10]; for (int i = 0; i < arr.length; i++) { arr[i]=r.nextInt(100); } for (int i = 0; i < arr.length; i++) { for (int j = 0; j < arr.length-i-1; j++) { if(arr[j]>arr[j+1]){ int h=arr[j]; arr[j]=arr[j+1]; arr[j+1]=h; } } } for (int i = 0; i < arr.length; i++) { System.out.println(arr[i]); } }} |
3.制作彩票35选7程序。 （就是1~35随机生成7个不重复的数）
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package day01;import java.util.Random;public class yeah { public static void main(String[] args) { // TODO Auto-generated method stub Random r=new Random (); int []arr=new int [7]; for (int i = 0; i < arr.length; i++) { arr[i]=r.nextInt(35)+1; } for (int i = 0; i < arr.length; i++) { System.out.print(arr[i]+" "); } }} |
4.定义一个长度为10的int数组(如果没有特殊说明,静态赋值动态赋值都可以),统计数组中的最大值、最小值、以及奇 数和偶数的个数
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package day01;import java.util.Random;public class yeah { public static void main(String[] args) { // TODO Auto-generated method stub Random r=new Random (); int []arr=new int [10]; for (int i = 0; i < arr.length; i++) { arr[i]=r.nextInt(100); } for (int i = 0; i < arr.length; i++) { System.out.print(arr[i]+" "); } int max=0,min=arr[0],jishu=0,oushu=0; for (int i = 0; i < arr.length; i++) { if(max<arr[i]) max=arr[i]; } for (int i = 0; i < arr.length; i++) { if(arr[i]<min) min=arr[i]; } for (int i = 0; i < arr.length; i++) { if(arr[i]%2==0) oushu+=1; else jishu+=1; } System.out.println("max="+max+",min="+min+",奇数个数"+jishu+",偶数个数"+oushu); }} |
