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  1. /*
  2.  * To change this license header, choose License Headers in Project Properties.
  3.  * To change this template file, choose Tools | Templates
  4.  * and open the template in the editor.
  5.  */
  6.  
  7. //Thuat toan quay lui
  8. public class ThuatToanQuayLui {
  9.  
  10.     int [] kq, chon, v;
  11.     int n, dem=0;
  12.  
  13.     //Khởi tạo giá trị
  14.     void khoitao()
  15.     {
  16.         n = 8;
  17.         v = new int[n];
  18.         v[0] = 5 ; v[1] = 2; v[3] = 4; v[4] = 8; v[5] = 9; v[6] = 7; v[7] = 5;
  19.         chon = new int[n];
  20.         kq = new int[n];
  21.         for(int j=0;j<n;j++)
  22.             chon[j] = kq[j] = 0;
  23.     }
  24.  
  25.     //In kết quả
  26.     void inkq()
  27.     {
  28.         System.out.println("\n Cach thu" + ++dem + ":");
  29.         for(int j=0;j<n;j++)
  30.             System.out.println(""+ kq[j]);
  31.  
  32.     }
  33.  
  34.     //Tìm số hợp lý
  35.     void tim(int i, int d)
  36.     {
  37.         if(i>n) inkq();
  38.         else
  39.             for(int j=0; j<n; j++)
  40.             {
  41.                 if(chon[j]==0 && v[j]>d)// Nếu bình xăng chưa được chọn và có thể bay 
  42.                 {
  43.                     kq[i-1] = v[j]; chon[j]=1;// Lấy bình xăng và đánh dấu đã đỗ.
  44.                     tim(i+1, v[j]-d);
  45.                     kq[i-1] = 0; chon[j]=0;
  46.  
  47.                 }
  48.             }
  49.     }
  50.  
  51.     public static void main(String[]args){
  52.         ThuatToanQuayLui m = new ThuatToanQuayLui();
  53.         int d=2;
  54.         m.khoitao();
  55.         m.tim(1,d);
  56.     }
  57. }
  58.  
Compilation error #stdin compilation error #stdout 0s 0KB
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Standard input is empty
compilation info 
Main.java:8: error: class ThuatToanQuayLui is public, should be declared in a file named ThuatToanQuayLui.java
public class ThuatToanQuayLui {
       ^
1 error
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Standard output is empty
https://ideone.com/FCdWwM
language:
Java (HotSpot 12)
created:
5 years ago
visibility:
public

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