Modify the FourInARow.java file to return whether a given array contains a winning configuration. Specifically, if any column has four consecutive items with the same value, they are a winner.

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FourInARow.java

public class FourInARow {
public static int checkWinning(int[][] board) {
// winner is 0 if there is no winner, 1 if team 1 wins,
// ... and 2 if team 2 wins.
int winner = 0;
// the counts are the number of consecutive entries for team 1,
// ... or team 2 in a particular column
int count1 = 0;
int count2 = 0;
// this outer loop counts over all the rows, and we would normally
// ... iterate across each row with the inner loop
// ... but we want to loop down every column, so I'm switching the
// ... i and j indices so that we loop down each column instead!
// the number of columns is board[0].length - the size of the first row
// ... (we'll assume they're all the same, so we'll just pick the first one!)
for(int j = 0; j < board[0].length; j++) {
// TODO: initialize count1 and count2 to 0 so that we have a
// ... fresh count within each column
// now, loop down each of the columns to look for a winner
// the number of rows is board.length
for(int i = 0; i < board.length; i++) {
// TODO: if board[i][j] is 1, tally one for team1's count,
// ... and similarly, if board[i][j] is 2, tally 1 for team2.
// ... BUT, also reset the other team's count to 0 (since they
// ... can't be winning if they don't have 4 in a row!).
// ... what should you do in the "else" clause here,
// ... if board[i][j] is 0?
// TODO: if count1 or count2 is 4, set winner to 1 (if count1 is 4),
// ... or 2 (if count2 is 4)
}
}
return winner;
}
}

In this exercise, you will fill in a function to determine the winner of a game of Four-in-a-Row. A game board (a 2D array of ints) initially contains all 0s. Each player (team 1 and 2) places a value into a column of the game board, and it falls to the bottom of the board. The game ends with a winner if the board contains four consecutive items down a column (only the vertical column - you don’t need to worry about the rows or diagonals). For example, this board represents a game won by team 2: