I am doing this exercise, the exercise says this:
*Given an input file containing 1000 random blackjack hands between 3 players (here: blackjack.txt), calculate the number of blackjacks encountered for any player in all games.
A blackjack is defined as an Ace of any suit and a 10 valued card (Jack, Queen ,King or 10) of any suit.
The input file looks like this: (as an example)
4H 5C AD JH 9C 10H
This means that player one has a 4 of hearts and a 5 of clubs; player 2 has an Ace of Diamonds and a Jack of Hearts (which counts as a blackjack); player 3 has a 9 of Clubs and a 10 of Hearts.
For the purpose of this problem, it is known that there is a standard 52 card deck which is reshuffled for each new game.*
I think I am in the correct approach, and my code is correct, but my answers fails, any hint, suggestion for getting a right answer
this is my code:
import java.io.*;
public class Problema16 {
public static void main(String args[]) {
File archivo = null;
FileReader fr = null;
BufferedReader br = null;
int counter = 0;
//int rest = 0;
try {
archivo = new File("C:\\Users\\\blackjack.txt");
fr = new FileReader(archivo);
br = new BufferedReader(fr);
String linea;
String[] linea2 = null;
while ((linea = br.readLine()) != null) //System.out.println(linea);
{
linea2 = linea.split(" ");
String a = (linea2[0]);
String b = (linea2[1]);
String c = (linea2[2]);
String d = (linea2[3]);
String e = (linea2[4]);
String f = (linea2[5]);
if ((a.startsWith("A") && (b.startsWith("J") || (b.startsWith("Q") || (b.startsWith("K") || (b.startsWith("10")))))) || ((a.startsWith("J") || (a.startsWith("Q") || (a.startsWith("K") || (a.startsWith("10"))))) && (b.startsWith("A")))) {
counter++;
//System.out.println(a + "" + b + "");
} else if ((c.startsWith("A") && (d.startsWith("J") || (d.startsWith("Q") || (d.startsWith("K") || (d.startsWith("10")))))) || ((c.startsWith("J") || (c.startsWith("Q") || (c.startsWith("K") || (c.startsWith("10"))))) && (d.startsWith("A")))) {
counter++;
//System.out.println(c + "" + d + "");
} else if ((e.startsWith("A") && (f.startsWith("J") || (f.startsWith("Q") || (f.startsWith("K") || (f.startsWith("10")))))) || ((e.startsWith("J") || (e.startsWith("Q") || (e.startsWith("K") || (e.startsWith("10"))))) && (f.startsWith("A")))) {
counter++;
//System.out.println(e + "" + f + "");
} else {
//sobra++;
}
}
System.out.println(counter);
//System.out.println(sobra);
} catch (Exception e) {
e.printStackTrace();
}
}
}
this is the exercise online 1. My answers is 119, but is wrong.
Your conditions in each if are hard to read with all the braces but seem OK.
Your problem lies in else if. Player #1 and Player #2 (and Player #3) can have blackjack at the same time where as your code will only count 1 of them.
Drop the else and you should be OK.
You can also improve the readability of your code a little. Some pointers: