数组排序

题目 数组排序

image-478106dc

思路分析

代码实现

import java.util.Scanner;

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

        Scanner sc = new Scanner(System.in);

        int N = sc.nextInt();
        int l = sc.nextInt();
        int r = sc.nextInt();
        int[] a = new int[N];

        for (int i = 0; i < N; i++) {
            a[i] = sc.nextInt();
        }
        sort(a,l,r);
    }

    public static void sort(int a[], int l, int r){
        for (int i = l; i <= r ; i++) {
            for (int j = l; j < i ; j++) {
                if (a[i] < a[j]) {
                    int tmp = a[i];
                    a[i] = a[j];
                    a[j] = tmp;
                }
            }
        }
        for (int i = 0; i < a.length; i++) {
            System.out.print(a[i] + " ");
        }
        System.out.println();
    }
}

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt(), l = sc.nextInt(), r = sc.nextInt();
        int[] w = new int[n];
        for (int i = 0; i < n; i ++ )
            w[i] = sc.nextInt();

        sort(w, l, r);
        for (int i = 0; i < n; i ++ )
            System.out.printf("%d ", w[i]);
    }

    private static void sort(int[] w, int l, int r) {
        for (int i = r; i > l; i -- ) {  // 冒泡排序
            for (int j = l; j < i; j ++ )
                if (w[j] > w[j + 1]) {
                    int t = w[j];
                    w[j] = w[j + 1];
                    w[j + 1] = t;
                }
        }
    }
}

import java.util.Arrays;

import java.util.Scanner;

public class Main{

    public static void main(String[] args){

        Scanner sc = new Scanner(System.in);

        int N = sc.nextInt(), l = sc.nextInt(), r = sc.nextInt();

        int[] a = new int[N];

        for(int i = 0; i < N; i++) a[i] = sc.nextInt();

        Arrays.sort(a, l, r + 1); // 左闭右开

        for(int i = 0; i < N; i++) System.out.print(a[i] + " ");

    }

}

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项目分区导航： 排列 ⬅️ | 04-数组排序 | ➡️ 最大公约数