java第七次作业
package test; public class test1 { /** * @param args */ public static void main(String[] args) { //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 int[] arr={10,20,30,40,50}; for (int i = 0; i < arr.length; i++) { System.out.println(arr[i]); } } }
import java.util.Scanner; public class test2 { /** * @param args */ public static void main(String[] args) { // 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。 int[] arr=new int[5]; Scanner input=new Scanner(System.in) ; for (int i = 0; i < arr.length; i++) { arr[i]=input.nextInt(); System.out.println(arr[i]); } } }
public class test3 { /** * @param args */ public static void main(String[] args) { // 定义字符型数组,分别存储c、h、 i、n、a 并在控制台输出 char[] arr={'c','h','i','n','a'}; for (int i = 0; i < arr.length; i++) { System.out.print(arr[i]); } } }
package test; import java.util.Scanner; public class test4 { /** * @param args */ public static void main(String[] args) { // 输入5个学生成绩,求总分和平均分 int[] arr=new int[5]; double sum=0; Scanner input=new Scanner(System.in) ; for (int i = 0; i < arr.length; i++) { System.out.println("请输入"+(i+1)+"个同学的成绩"); arr[i]=input.nextInt(); sum=sum+arr[i]; } System.out.println("总成绩为"+sum); System.out.println("平均分为"+sum/arr.length); } }
package test; public class test5 { /** * @param args */ public static void main(String[] args) { //定义数组{12,53,23,44,53} 用for和foreach分别输出,再倒序输出 int[] arr={12,53,23,44,53}; for (int i = 0; i < arr.length; i++) { System.out.println(arr[i]); } System.out.println("--------------------------"); for (int j = 4; j >= 0; j--) { System.out.println(arr[j]); } } }
package test; import java.util.Scanner; public class test { public static void main(String[] args) { int[] arr={12,53,23,44,53}; for (int i : arr) { System.out.println(i); } for (int i = arr.length-1; i >=0 ; i--) { System.out.println(arr[i] + "\t"); } } }
package test; import java.util.Scanner; public class test1 { public static void main(String[] args) { // 定义一个整型数组,赋值后求出奇数个数和偶数个数 Scanner input = new Scanner(System.in); int a=0; int b=0; int []m = new int[10]; System.out.println("请输入10个整数"); for (int i = 0; i < m.length; i++) { m[i] = input.nextInt(); if (m[i] == 0) { } else if(m[i] %2==0) { b ++; }else{ a ++; } } System.out.println("奇数有" + a + "个!"); System.out.println("偶数有" + b + "个!"); } }
package test; public class test2 { public static void main(String[] args) { // 生成一个100长度数组,里面的数分别是1-100,并输出 int[] a = new int[100]; for (int i = 0; i < a.length; i++) { a[i] = i + 1; System.out.println(a[i]); } } }
package test; import java.util.Scanner; public class test3 { public static void main(String[] args) { // 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 Scanner input = new Scanner(System.in); double[] cj = new double[10]; for (int i = 0;i<cj.length;i++) { System.out.println("请输入第"+(i+1)+"个学生成绩:"); double c = input.nextDouble(); cj[i] = c; } for (int i = 0;i<cj.length;i++) { if (cj[i] > 95) { System.out.println((i+1) + "号学生成绩大于95,不能加分!"); }else{ cj[i] = cj[i] + 5; } } for (int i = 0;i<cj.length;i++) { System.out.println((i+1) + "号学生加分后成绩为: " + cj[i]); } } }
package test;
public class test5 {
/**
* @param args
*/
public static void main(String[] args) {
//定义数组{12,53,23,44,53} 用for和foreach分别输出,再倒序输出
int[] arr={12,53,23,44,53};
for (int i = 0; i < arr.length; i++) {
System.out.println(arr[i]);
}
System.out.println("--------------------------");
for (int j = 4; j >= 0; j--) {
System.out.println(arr[j]);
}
}
}