Question

IN JAVA create a program that has 8 players and ranks them randomly and contains 3 rounds. For each round the highest ranked player plays the lowest ranked one i.e., in quarter-final round, player ranked 1 plays player ranked 8, player ranked 2 plays player ranked 7 and so on. Report the winner of each match, simulating using random values of your choice USING JAVA COLLECTIONS IS NOT ALLOWED

Answer 1

The detailed JAVA program is as given. I have randomly given the names of the players. You can change the name and ranking as per your choice.

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import java.util.Random;

public class Tournament {

   public static void main(String[] args) {
       // TODO Auto-generated method stub
       String[] players = new String[]{"Abc","Bcd","Cde","Def","Efg","Fgh","Ghi","Hij"}; //String array to hold the name of the players
       int ranking[] = new int[] {2,3,1,5,6,7,8,4}; // Integer Array to hold the ranking of the player. You can change the ranking according to your choice
       //Displaying the Players as is given in the array
       System.out.println("Ranking of the players are as follows :");
       for(int i =0;i<8;i++)
           System.out.println(players[i]+" is ranked "+ ranking[i]);
      
       //Sorting the ranking array and players array as per ranking using selection sort
       for (int i = 0; i < 7; i++)
{
// Find the minimum element in unsorted array
int min_idx = i;
for (int j = i+1; j < 8; j++)
if (ranking[j] < ranking[min_idx])
min_idx = j;
  
// Swap the found minimum element with the first
// element
int temp = ranking[min_idx];
ranking[min_idx] = ranking[i];
ranking[i] = temp;
String temp1=players[min_idx];
players[min_idx] = players[i];
players[i] = temp1;
}
      
       System.out.println("Ranking in sorted order :");
       for(int i =0;i<8;i++)
           System.out.println(players[i]+" is ranked "+ ranking[i]);
      
       //Code for Quarter-Final
       String qtrfinal[][]=new String[4][2]; // Array to hold the competitors of the Quarter - Final
       for(int i=0,j=7;i<4 ;i++,j--)
       {
       qtrfinal[i][0]=players[i];
       qtrfinal[i][1]=players[j];
       }
       //Displaying the order of matches
       System.out.println("Order of Matches(Quarter Final) :");
       for(int i=0,j=7;i<4 ;i++,j--)
       {
       System.out.println("["+(i+1)+"] "+qtrfinal[i][0]+" Vs ["+(j+1)+"]"+qtrfinal[i][1]);
       }
      
       Random ran = new Random(); //Random fuction to generate random number for winner
      
       System.out.println("Result of Matches(Quarter Final) :");
       int semi[] = new int[4];// array to hold the index of winners in quarter final
       for(int i=0,j=7;i<4 ;i++,j--)
       {
           System.out.println("["+(i+1)+"] "+qtrfinal[i][0]+" Vs ["+(j+1)+"]"+qtrfinal[i][1]);
           int nxt = ran.nextInt(2); //Finding the winner
           int winindex = findfunction(players,qtrfinal[i][nxt]); //Calling the find function to get the index of the winner in ranking array.
           System.out.println("["+(ranking[winindex])+"] "+qtrfinal[i][nxt]+" wins");
           semi[i]=winindex;// Assigning the index of the winner qualified for semifinal
       //qtrfinal[i][0]=players[i];
       //qtrfinal[i][1]=players[j];
       }
   /*Code for semi final Starts here*/
      
       String semifinal[][]=new String[2][2];// Array to hold the names of semifinalists
   //Sorting the array using selection sort for players qualified in semi final
       for (int i = 0; i < 4; i++)
{
// Find the minimum element in unsorted array
int min_idx = i;
for (int j = i+1; j < 4; j++)
if (semi[j] < semi[min_idx])
min_idx = j;
  
// Swap the found minimum element with the first
// element
int temp = semi[min_idx];
semi[min_idx] = semi[i];
semi[i] = temp;
}
      
       for(int i=0,j=3;i<2 ;i++,j--)
       {
       semifinal[i][0]=players[semi[i]];
       semifinal[i][1]=players[semi[j]];
       }
       System.out.println("Order of Matches(Semi Final) : ");
      
       for(int i=0;i<2;i++)
       {
       int findex = findfunction(players,semifinal[i][0]);
       int secindex = findfunction(players,semifinal[i][1]);
       System.out.println("["+(ranking[findex])+"] "+semifinal[i][0]+" Vs "+(ranking[secindex])+"] "+semifinal[i][1]);
       }
       System.out.println("Result of Matches(Semi Final) :");
      
       int final1[] = new int[2];// Array to hold the players qualified for final
       for(int i=0;i<2;i++)
       {
       int findex = findfunction(players,semifinal[i][0]);
       int secindex = findfunction(players,semifinal[i][1]);
       System.out.println("["+(ranking[findex])+"] "+semifinal[i][0]+" Vs "+(ranking[secindex])+"] "+semifinal[i][1]);
       int nxt = ran.nextInt(2); // Finding the winners in Semi final
       int winindex = findfunction(players,semifinal[i][nxt]);
       System.out.println("["+(ranking[winindex])+"] "+semifinal[i][nxt]+" wins");
       final1 [i]=winindex;
      
       }
      
       /*Coding for findign final starts Here*/
       String fnl[][]=new String[1][2]; //Array to hold the playeres
       fnl[0][0]=players[final1[0]];
           fnl[0][1]=players[final1[1]];
          
           System.out.println("Order of Matches(Final) : ");
       int idx1 = findfunction(players,fnl[0][0]);
           int idex2 = findfunction(players,fnl[0][1]);
           System.out.println("["+(ranking[idx1])+"] "+fnl[0][0]+" Vs "+(ranking[idex2])+"] "+fnl[0][1]);
          
           System.out.println("Result of Final : ");
           idx1 = findfunction(players,fnl[0][0]);
           idex2 = findfunction(players,fnl[0][1]);
               System.out.println("["+(ranking[idx1])+"] "+fnl[0][0]+" Vs "+(ranking[idex2])+"] "+fnl[0][1]);
           int nxt = ran.nextInt(2);
           int temp1 =0 ;
           if(nxt == 0)
               temp1 = 1;
           int winindex = findfunction(players,fnl[0][nxt]);
           System.out.println("["+(ranking[winindex])+"] "+fnl[0][nxt]+" wins the tournament");
           int idex = findfunction(players,fnl[0][temp1]);
           System.out.println("["+(ranking[idex])+"] "+fnl[0][temp1]+" is Runner-UP");
      
   }
   //Function to find the ranking of a given player. It takes the players array and player name as input and provides the
   // index of the ranking array for that perticular player.
   public static int findfunction (String []a, String player)
   {
       int i=0;
       for(;i<a.length;i++)
       {
           if(a[i].equals(player))
               break;//str1.equals(str2);)
       }
       return(i);
   }

}
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The output of the program is as given below for a particular run. For every run the Output will change i.e. it may not be the same.

Ranking of the players are as follows :
Abc is ranked 2
Bcd is ranked 3
Cde is ranked 1
Def is ranked 5
Efg is ranked 6
Fgh is ranked 7
Ghi is ranked 8
Hij is ranked 4
Ranking in sorted order :
Cde is ranked 1
Abc is ranked 2
Bcd is ranked 3
Hij is ranked 4
Def is ranked 5
Efg is ranked 6
Fgh is ranked 7
Ghi is ranked 8
Order of Matches(Quarter Final) :
[1] Cde Vs [8]Ghi
[2] Abc Vs [7]Fgh
[3] Bcd Vs [6]Efg
[4] Hij Vs [5]Def
Result of Matches(Quarter Final) :
[1] Cde Vs [8]Ghi
[8] Ghi wins
[2] Abc Vs [7]Fgh
[2] Abc wins
[3] Bcd Vs [6]Efg
[3] Bcd wins
[4] Hij Vs [5]Def
[4] Hij wins
Order of Matches(Semi Final) :
[2] Abc Vs 8] Ghi
[3] Bcd Vs 4] Hij
Result of Matches(Semi Final) :
[2] Abc Vs 8] Ghi
[8] Ghi wins
[3] Bcd Vs 4] Hij
[3] Bcd wins
Order of Matches(Final) :
[8] Ghi Vs 3] Bcd
Result of Final :
[8] Ghi Vs 3] Bcd
[3] Bcd wins the tournament
[8] Ghi is Runner-UP