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qq_39936465 2019-10-16
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import java.util.Scanner;
import java.util.stream.IntStream;
public class demo1 {
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner sc=new Scanner(System.in);
int t=sc.nextInt();
int[] s=new int[t*2];
IntStream.range(0, t).forEach(i->{
s[2*i]=sc.nextInt();
s[2*i+1]=sc.nextInt();
});
IntStream.range(0, t).forEach(i->{
IntStream.range(i+1, t).forEach(j->{
if(s[2*j+1]>s[2*i+1]) {
int k=s[2*i];
int l=s[2*i+1];
s[2*i]=s[2*j];
s[2*i+1]=s[2*j+1];
s[2*j]=k;
s[2*j+1]=l;
}
});
});
IntStream.range(0, t).forEach(i->{
System.out.print(s[2*i]+" "+s[2*i+1]+"\r\n");
});
}
}
不能留白 2019-10-16
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大佬有没有简单点的方法，就用for，if 什么什么的我们还没学到这么后面
[/quote]
首先，if和for都是最基础的
if是判断
for是循环
其次，解决这道题肯定要用到if和for的，没有比较，你怎么排序
[/quote]
首先，if和for都是最基础的
if是判断
for是循环
其次，解决这道题肯定要用到if和for的，没有比较，你怎么排序
Went1972 2019-10-16
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谢谢真的很谢谢
淡青の月 2019-10-16
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import java.util.*;
public class Rank {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
int N = Integer.parseInt(input.nextLine());
int[] sno = new int[N];
int[] ach = new int[N];
for (int i = 0; i < N; i++) {
String s = input.nextLine();
String[] num = s.split(" ");
sno[i] = Integer.parseInt(num[0]);
ach[i] = Integer.parseInt(num[1]);
}
bubbleSort(sno, ach);
for (int i = 0; i < N; i++) {
System.out.println(sno[i] + " " + ach[i]);
}
}
public static void bubbleSort(int[] sno, int[] ach) {
boolean needNextPass = true;
for (int k = 1; k < ach.length && needNextPass; k++) {
needNextPass = false;
for (int i = 0; i < ach.length - k; i++) {
if (ach[i] > ach[i + 1]) {
int temp = ach[i];
int t = sno[i];
ach[i] = ach[i + 1];
sno[i] = sno[i + 1];
ach[i + 1] = temp;
sno[i + 1] = t;
needNextPass = true;
}
}
}
for (int i = 0; i < ach.length - 1; i++) {
if (ach[i] == ach[i + 1]) {
if (sno[i + 1] < sno[i]) {
int t = sno[i];
sno[i] = sno[i + 1];
sno[i + 1] = t;
}
}
}
}
}
这应该很基础，都能看懂
public class Rank {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
int N = Integer.parseInt(input.nextLine());
int[] sno = new int[N];
int[] ach = new int[N];
for (int i = 0; i < N; i++) {
String s = input.nextLine();
String[] num = s.split(" ");
sno[i] = Integer.parseInt(num[0]);
ach[i] = Integer.parseInt(num[1]);
}
bubbleSort(sno, ach);
for (int i = 0; i < N; i++) {
System.out.println(sno[i] + " " + ach[i]);
}
}
public static void bubbleSort(int[] sno, int[] ach) {
boolean needNextPass = true;
for (int k = 1; k < ach.length && needNextPass; k++) {
needNextPass = false;
for (int i = 0; i < ach.length - k; i++) {
if (ach[i] > ach[i + 1]) {
int temp = ach[i];
int t = sno[i];
ach[i] = ach[i + 1];
sno[i] = sno[i + 1];
ach[i + 1] = temp;
sno[i + 1] = t;
needNextPass = true;
}
}
}
for (int i = 0; i < ach.length - 1; i++) {
if (ach[i] == ach[i + 1]) {
if (sno[i + 1] < sno[i]) {
int t = sno[i];
sno[i] = sno[i + 1];
sno[i + 1] = t;
}
}
}
}
}
这应该很基础，都能看懂
Went1972 2019-10-16
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大佬有没有简单点的方法，就用for，if 什么什么的我们还没学到这么后面
Went1972 2019-10-16
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谢谢谢谢太感谢了
不能留白 2019-10-16
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我写的double型，有需要的你改成int型就行
package eg4;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Scanner;
public class Tests {
public static void main(String[] args) {
@SuppressWarnings("resource")
Scanner sc = new Scanner(System.in);
System.out.println("请输入学生总人数：");
int n = sc.nextInt();
ArrayList<Student> students = new ArrayList<Student>();
for (int i = 0; i < n; i++) {
Student student = new Student(sc.nextDouble(), sc.nextDouble());
students.add(student);
}
Collections.sort(students);
System.out.println("排序后的成绩为：");
for (Student student : students) {
System.out.println(student.getXuehao() + " " + student.getChengji());
}
}
}
class Student implements Comparable<Student> {
private double xuehao;
private double chengji;
public Student(double xuehao, double chengji) {
this.xuehao = xuehao;
this.chengji = chengji;
}
public double getXuehao() {
return xuehao;
}
public void setXuehao(double xuehao) {
this.xuehao = xuehao;
}
public double getChengji() {
return chengji;
}
public void setChengji(double chengji) {
this.chengji = chengji;
}
@Override
public int compareTo(Student s) {
int key = 0;
if (s.getChengji() < this.getChengji())
key = 1;
else if (s.getChengji() == this.getChengji()) {
if (s.getXuehao() < this.getXuehao())
key = 1;
}
return key;
}
}
