第七次作业
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 Test; public class Test1 { public static void main(String[] args) { int []a = new int []{10,20,30,40,50}; for (int i = 0; i < a.length; i++) { System.out.println(a[i]); } } }
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 Test; import java.util.Scanner; public class Test2 { public static void main(String[] args) { int []a = new int [5]; Scanner input = new Scanner(System.in); for (int i = 0; i < a.length; i++) { a[i] = input.nextInt(); System.out.println(a[i]); } } }
定义字符型数组,分别存储c、h、 i、n、a 并在控制台输出
package Test; import java.util.Scanner; public class Test3 { public static void main(String[] args) { String []a = new String []{"c","h","i","n","a"}; Scanner input = new Scanner(System.in); for (int i = 0; i < a.length; i++) { a[i] = input.nextLine(); System.out.println(a[i]); } } }
输入5个学生成绩,求总分和平均分
package Test; import java.util.Scanner; public class Test4 { public static void main(String[] args) { Scanner input = new Scanner(System.in); int []a = new int[5]; for (int i = 0; i < a.length; i++) { a[i] = input.nextInt(); } int sum = a[0] + a[1] + a[2] + a[3] + a[4]; int avg = sum / 5; System.out.println(sum); System.out.println(avg); } }
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 exec; import java.util.Scanner; public class Exec1 { public static void main(String[] args) { int j = 0,o = 0; int []a = new int [10]; Scanner input = new Scanner(System.in); for (int i = 0; i < a.length; i++) { a[i] = input.nextInt(); if (a[i] % 2 == 0) { o++; } if (a[i] % 2 == 1) { j++; } } System.out.println("偶数个数为"+o); System.out.println("奇数个数为"+j); } }
生成一个100长度数组,里面的数分别是1-100,并输出
package exec; public class Exec2 { public static void main(String[] args) { int []a = new int [100]; for (int i = 1; i <= a.length; i++) { System.out.println(i); } } }
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 exec; import java.util.Scanner; public class Exec3 { public static void main(String[] args) { double []a = new double [10]; Scanner input = new Scanner(System.in); for (int i = 0; i < a.length; i++) { a[i] = input.nextDouble(); if (a[i] > 95) { System.out.println("错误"); } if (a[i] <= 95) { System.out.println(a[i]+5); } } } }