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 com.a01;

public class hellowold {
    public static void main(String[] args) {

        int[] a = { 10, 20, 30, 40, 50 };
        System.out.println(a[0]);
        System.out.println(a[1]);
        System.out.println(a[2]);
        System.out.println(a[3]);
        System.out.println(a[4]);
    }
}
//2.编写一个简单程序,要求数组长度为5,动态赋值10,20,30,40,50,在控制台输出该数组的值。
package com.a01;

public class hellowold {
    public static void main(String[] args) {
        int[] a = { 10, 20, 30, 40, 50 };
        for (int i = 0; i < 5; i++) {
            System.out.println(a[i]);
        }
    }
}
//3.编写一个简单程序,定义整型数组,里面的元素是{23,45,22,33,56},求数组元素的和、平均值
package com.a01;

public class hellowold {
    public static void main(String[] args) {
        int[] n = { 23, 45, 22, 33, 56 };
        double sum = 0;
        for (int i = 0; i < 5; i++) {
            sum += n[i];
        }
        double y = sum / 5;
        System.out.println("和为:" + sum + "平均值为:" + y);
    }
}
//4.在一个有8个整数(18,25,7,36,13,2,89,63)的数组中找出其中最大的数及其下标。
package com.a01;

public class hellowold {
    public static void main(String[] args) {
        int[] k = { 18, 25, 7, 36, 13, 2, 89, 63 };
        int max = k[0];
        int a = 0;
        for (int i = 0; i < k.length; i++) {
            if (k[i] > max) {
                max = k[i];
                a = i + 1;
            }
        }
        System.out.println(" 最大为:" + max + "  下标为:" + a);
    }
}
//5. 将一个数组中的元素逆序存放(知识点:数组遍历、数组元素访问)
package com.a01;

public class hellowold {
    public static void main(String[] args) {
        int[] a = new int[] { 1, 3, 2, 5, 8 };
        int t;
        for (int i = 0; i < a.length / 2; i++) {
            t = a[i];
            a[i] = a[a.length - 1 - i];
            a[a.length - 1 - i] = t;
        }
        for (int i = 0; i < a.length; i++) {
            System.out.print(a[i] + ", ");
        }
    }
}
6、有一个已经排好序的数组。现输入一个数,要求按原来的规律将它插入数组中。(附加题)
原文地址:https://www.cnblogs.com/hyonf/p/12666058.html