java第七次作业
1.编写一个简单程序,要求数组长度为5,静态赋值10,20,30,40,50,在控制台输出该数组的值。
package aini; public class Test1 { /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub int []a={10,20,30,40,50}; for (int i = 0; i < 5; i++) { System.out.println(a[i]); } } }
2.编写一个简单程序,要求数组长度为5,动态赋值,并在控制台输出该数组的值。
package aini; public class Test1 { /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub int []a={10,20,30,40,50}; for (int i = 0; i < 5; i++) { System.out.println(a[i]); } } }
3.定义字符型数组,分别存储c、h、 i、n、a 并在控制台输出
package aini; public class Test3 { /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub String[] str=new String[]{"c","h","i","n","a"}; for (int i = 0; i < str.length; i++) { System.out.println(str[i]); } } }
4.输入5个学生成绩,求总分和平均分
package aini; import java.util.Scanner; public class Test4 { /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub Scanner input=new Scanner(System.in); int []a=new int[5]; int sum=0; double ave; System.out.println("请输入5个学生成绩"); for (int i = 0; i < a.length; i++) { a[i]=input.nextInt(); } sum=a[0]+a[1]+a[2]+a[3]+a[4]; ave=(a[0]+a[1]+a[2]+a[3]+a[4])/5; System.out.print("总和为"+sum+"平均分为"+ave); } }
5.定义数组{12,53,23,44,53} 用for和foreach分别输出,再倒序输出(for)
package aini; public class Test5 { /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub int []a={12,53,23,44,53}; for (int i = 0; i < a.length; i++) { System.out.println(a[i]); } for (int i :a) { System.out.println(i); } for (int i = 4; i >= 0; i--) { System.out.println(a[i]); } } }
1.定义一个长度为10的整型数组,赋值(动态静态都可以)后求出奇数个数和偶数个数
package com; import java.util.Random; import java.util.Scanner; public class Test5 { public static void main(String[] args) { // TODO Auto-generated method stub int a[] = {12,53,23,44,53}; int ji = 0,ou = 0; for(int i = 0;i < 5;i++){ if(a[i] % 2 == 0){ ou++; }else ji++; } System.out.println("奇数有" + ji + "个" + "偶数有" + ou + "个"); } }
2.生成一个100长度数组,里面的数分别是1-100,并输出
package com; import java.util.Random; import java.util.Scanner; public class Test5 { public static void main(String[] args) { // TODO Auto-generated method stub int a[] = new int [100]; for(int i = 0;i < 1;i++){ for(int j = 1;j < 101 ; j++){ a[i] = j; System.out.println(a[i]); } } } }
3.定义一个double数组,存放10个学生的成绩,给所有同学加5分,不能超过100分。
package com; import java.util.Random; import java.util.Scanner; public class Test5 { public static void main(String[] args) { // TODO Auto-generated method stub double x[] = new double[10]; Scanner input = new Scanner (System.in); System.out.println("输入十名学生成绩"); for(int i = 0;i < x.length;i++){ x[i] = input .nextDouble(); } System.out.println("给所有同学加5分,最高不能超过100分"); for (int i = 0; i < x.length; i++) { x[i] += 5; if(x[i]>100){ x[i] = 100; } } for (int i = 0; i < x.length; i++) { System.out.println(x[i]); } } }
posted on 2021-04-19 15:23 HumbleSwag 阅读(36) 评论(0) 编辑 收藏 举报