Java第五次作业
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 ccc; public class Text1 { public static void main(String[] args) { // TODO Auto-generated method stub int []a=new int[5]; a=new int[] {10,20,30,40,50}; for(int i:a) { System.out.println(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 ccc; import java.util.Scanner; public class Text1 { public static void main(String[] args) { // TODO Auto-generated method stub Scanner input=new Scanner(System.in); System.out.println("请输入数组的五个值"); int []a=new int[5]; for(int i=0;i<a.length;i++) { a[i]=input.nextInt(); } for(int i:a) { System.out.println(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 ccc; import java.util.Scanner; public class Text1 { public static void main(String[] args) { // TODO Auto-generated method stub Scanner input=new Scanner(System.in); char []a=new char[5]; a= new char[]{'c','h','i','n','a'}; for(char i:a) { System.out.println(i); } } }
4.输入5个学生成绩，求总分和平均分
package ccc; import java.util.Scanner; public class Text1 { public static void main(String[] args) { // TODO Auto-generated method stub Scanner input=new Scanner(System.in); System.out.println("请输入五个学生成绩"); int []s=new int[5]; double a=0; for (int i = 0; i < s.length; i++) { s[i]=input.nextInt(); a+=s[i]; } System.out.println(a/5); } }
5.定义数组{12,53,23,44,53} 用for和foreach分别输出，再倒序输出
package ccc; //import java.util.Scanner; public class Text1 { public static void main(String[] args) { // TODO Auto-generated method stub //Scanner input=new Scanner(System.in); int []a=new int[5]; a=new int[] {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 = a.length-1; i >=0 ; i--) { System.out.println(a[i]); } } }
6定义一个整型数组，赋值(动态静态都可以)后求出奇数个数和偶数个数
package ccc; //import java.util.Scanner; public class Text1 { public static void main(String[] args) { // TODO Auto-generated method stub //Scanner input=new Scanner(System.in); int []a=new int[5]; a=new int[] {1,2,3,4,5}; int num1=0; int num2=0; for (int i = 0; i < a.length; i++) { if(a[i]%2==1) num1++; else num2++; } System.out.println("该数组的奇数有"+num1+"个"); System.out.println("该数组的偶数有"+num2+"个"); } }
7.生成一个100长度数组，里面的数分别是1-100，并输出
package ccc; //import java.util.Scanner; public class Text1 { public static void main(String[] args) { // TODO Auto-generated method stub //Scanner input=new Scanner(System.in); int []a=new int[100]; for (int i = 0; i < a.length; i++) { a[i]=i+1; System.out.println(a[i]); } } }
8.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 ccc; //import java.util.Scanner; public class Text1 { public static void main(String[] args) { // TODO Auto-generated method stub //Scanner input=new Scanner(System.in); double []a=new double[10]; a=new double[] {91,92,93,94,95,96,97,98,99,100}; for (int i = 0; i < a.length; i++) { if(a[i]>=95) a[i]=100; else a[i]+=5; } for (double i :a) { System.out.println(i); } } }
