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finished Checkers Checkpoint #15

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1d938d3
finished Checkers Checkpoint
Dec 4, 2018
31751d1
added more methods to game class in order to make game logic easier t…
Dec 6, 2018
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320 changes: 320 additions & 0 deletions Checkpoint2/Program.cs
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using System;
using System.Collections.Generic;
using System.Linq;

namespace Checkers
{
class Program
{
static void Main(string[] args)
{
//instatiates Game class
Game run = new Game();
}
}

public class Checker
{
//each checker has a symbol position array and color atribute
public string Symbol { get; set; }
public int[] Position { get; set; }
public string Color { get; set; }

//sets symbol for each color of checker
public Checker(string color, int[] position)
{

this.Position = position;

this.Color = color;

if (Color == "white")
{
Symbol = "O";
}
else
{
Symbol ="@";
}
}
}

public class Board
{
//board has grid and list of checkers attributes
public string[,] Grid { get; set; }
public List<Checker> Checkers { get; set; }

//this method draws the current state of the board when called
public void CreateBoard()
{
//top two lines are the column numbers and top border
Console.WriteLine(" 0 1 2 3 4 5 6 7 ");
Console.WriteLine(" ________________________________________ ");
//loops through rows
for (int i = 0; i < 8; i++)
{
//even row places start on column two
if(i%2 == 0)
{
Console.WriteLine(i+" |█████ "+ Grid[1,i] +" █████ "+ Grid[3,i] +" █████ "+ Grid[5,i] +" █████ "+ Grid[7,i] +" |");
Console.WriteLine(" |█████ █████ █████ █████ |");
}
//last row has bottom border
else if (i == 7)
{
Console.WriteLine(i+" | "+ Grid[0,i] +" █████ "+ Grid[2,i] +" █████ "+ Grid[4,i] +" █████ "+ Grid[6,i] +" █████|");
Console.WriteLine(" |_____█████_____█████_____█████_____█████|");
}
//odd row places start on column 1
else
{
Console.WriteLine(i+" | "+ Grid[0,i] +" █████ "+ Grid[2,i] +" █████ "+ Grid[4,i] +" █████ "+ Grid[6,i] +" █████|");
Console.WriteLine(" | █████ █████ █████ █████|");
}
}
}

public void GenerateCheckers()
{
//array of checker positions
int[,] whitePositions = {{0,5}, {2,5}, {4,5}, {6,5}, {1,6}, {3,6}, {5,6}, {7,6}, {0,7}, {2,7}, {4,7}, {6,7}};
int[,] blackPositions = {{1,0}, {3,0}, {5,0}, {7,0}, {0,1}, {2,1}, {4,1}, {6,1}, {1,2}, {3,2}, {5,2}, {7,2}};


//creates new list of checkers
Checkers = new List<Checker>();

//for the number of checkers that will be on either side
for(int i=0; i<12; i++)
{
//instantiates and adds new checkers to Checkers list with position from White and Black positions arrays
Checker whiteChecker = new Checker("white",new int[] {whitePositions[i,0],whitePositions[i,1]});
Checkers.Add(whiteChecker);
Checker blackChecker = new Checker("black",new int[] {blackPositions[i,0],blackPositions[i,1]});
Checkers.Add(blackChecker);
}
}

//places initial checkers
public void PlaceCheckers()
{
Grid = new string[8,8];
//goes through x axis of grid
for (int x = 0; x < 8; x++)
{
//goes through y axis of grid
for (int y = 0; y < 8; y++)
{
//sets each grid space to a string containing a space
Grid[x,y] = " ";
}
}
//loops through checkers in Checkers list
for (var i = 0; i < Checkers.Count; i++)
{
//position equals current checkers position
int[] position = Checkers[i].Position;
//grid at current checkers position equals current checkers symbol
Grid[position[0],position[1]] = Checkers[i].Symbol;
}
}

//method calls placeCheckers method and createBoard method to draw the initial board
public void DrawBoard()
{
PlaceCheckers();
CreateBoard();
}

public Checker SelectChecker(int column, int row)
{
//returns checker at column and row passed in when method is called
return Checkers.Find(x => x.Position.SequenceEqual(new List<int> { column, row }));
}

public void RemoveChecker(int column, int row)
{
//sets removedChecker equal to checker at column and row passed in
Checker removedChecker = Checkers.Find(x => x.Position.SequenceEqual(new List<int> { column, row }));
//removes checker from Checkers list
Checkers.Remove(removedChecker);
//sets checkers grid space to emptey
this.Grid[column,row] = " ";
//lets players know that a piece was captured
Console.WriteLine("Piece Captured!");
}

public bool CheckForWin()
{
//returns true if all pieces are white or no white pieces exist
return Checkers.All(x => x.Color == "white") || !Checkers.Exists(x => x.Color == "white");
}
}

class Game
{
//instantiates new board
public Board board = new Board();

public Game()
{
//of size 8 by 8
board.Grid = new string[8,8];

//generates initial checkers
board.GenerateCheckers();
//draws initial board
board.DrawBoard();

//while no one has won
while(!board.CheckForWin())
{
//get input for pickup column and store as int columnStart
Console.WriteLine("Enter pickup column:");
int columnStart = Convert.ToInt16(Console.ReadLine());

//get input for pickup row and store as int rowStart
Console.WriteLine("Enter pickup row:");
int rowStart = Convert.ToInt16(Console.ReadLine());

//if input is not within bounds of board or selected grid square is empty let user know that no piece was selected
if (SelectablePiece(columnStart, rowStart))
{
//selected checker equals checker at user inputed position
Checker selectedChecker = board.SelectChecker(columnStart,rowStart);

//get input for drop off column and store as int columnTo
Console.WriteLine("Enter drop off Column:");
int columnTo = Convert.ToInt16(Console.ReadLine());

//get input for drop off row and store as int rowTo
Console.WriteLine("Enter drop off Row:");
int rowTo = Convert.ToInt16(Console.ReadLine());
bool movingLeft = MovingLeft(columnStart, columnTo);

if(selectedChecker.Color == "white" && IsLegalWhite(columnStart, rowStart, columnTo, rowTo))
{
// if player moves left and spot to left and up one is enemy
if(movingLeft && board.Grid[columnStart-1,rowStart-1] == "@")
{
//remove enemy that player has jumped
board.RemoveChecker(columnStart-1,rowStart-1);
}
// if player moves right and spot to right and up one is enemy
else if(!movingLeft && board.Grid[columnStart+1,rowStart-1] == "@")
{
//remove enemy that player has jumped
board.RemoveChecker(columnStart+1,rowStart-1);
}
//start grid position is now empty
board.Grid[columnStart,rowStart] = " ";
//To grid positon = selected checkers symbol
board.Grid[columnTo,rowTo] = selectedChecker.Symbol;
//changes selected checkers position to new position
selectedChecker.Position[0] = columnTo;
selectedChecker.Position[1] = rowTo;
}
//if selected checker is black
else if(selectedChecker.Color == "black" && IsLegalBlack(columnStart, rowStart, columnTo, rowTo))
{
// if player moves left and spot to left and down one is enemy
if(movingLeft && board.Grid[columnStart-1,rowStart+1] == "O")
{
//remove enemy that player has jumped
board.RemoveChecker(columnStart-1,rowStart+1);
}
// if player moves right and spot one right and one down is enemy
else if(!movingLeft && board.Grid[columnStart+1,rowStart+1] == "O")
{
//remove enemy that player has jumped
board.RemoveChecker(columnStart+1,rowStart+1);
}
//start grid position is now empty
board.Grid[columnStart,rowStart] = " ";
//To grid positon = selected checkers symbol
board.Grid[columnTo,rowTo] = selectedChecker.Symbol;
//changes selected checkers position to new position
selectedChecker.Position[0] = columnTo;
selectedChecker.Position[1] = rowTo;
}
//if move is not valid let user know
else
{
Console.WriteLine("invalid move");
}
}
//draws new board before loop repeats or ends
board.CreateBoard();
}
//if all checkers in Checkers list are white then white wins
if(board.Checkers.All(x => x.Color == "white"))
{
Console.WriteLine("White wins!");
}
//if all checkers in Checkers list are black then black wins
else if(board.Checkers.All(x => x.Color == "black"))
{
Console.WriteLine("Black wins!");
}
}

//method checks if user chooses a selectable piece
public bool SelectablePiece(int columnStart, int rowStart)
{
//piece is outside of bounds of board or selected grid square does not have a piece
if ((columnStart > 7 || columnStart < 0 || rowStart > 7 || rowStart < 0) || board.Grid[columnStart,rowStart] == " ")
{
//let user know no piece was selected and return false
Console.WriteLine("No piece selected");
return false;
}
else
{
return true;
}
}
//if selected piece is white check if move is legal
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@yousifS yousifS Dec 7, 2018

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Your isLegalWhite and isLegalBlack are very similar. Could you have had 1 method and just passed in a variable that indicated if it was white or black?

public bool IsLegalWhite(int columnStart, int rowStart,int columnTo, int rowTo)
{
//checks if piece is moving left
bool movingLeft = MovingLeft(columnStart, columnTo);
if(//columnTo and rowTo is empty and piece is not moving to same row and column
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@yousifS yousifS Dec 7, 2018

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that if condition is a little hard to read. maybe using variable to hold each "thing" you are testing, or having multiple if statements?

(board.Grid[columnTo,rowTo] == " " && rowTo != rowStart && columnTo != columnStart)
//and piece is moving right and is moving 1 right and 1 up or piece 1 up and 1 right from start is enemy and piece is moving 2 right and two up
&& ((!movingLeft && ((columnTo == columnStart+1 && rowTo == rowStart - 1) || (board.Grid[columnStart+1,rowStart-1] == "@" && columnTo == columnStart+2 && rowTo == rowStart - 2)))
//or piece is moving left and is moving 1 left and 1 up or piece 1 up and 1 left from start is enemy and piece is moving 2 left and two up
|| (movingLeft && ((columnTo == columnStart -1 && rowTo == rowStart - 1) || (board.Grid[columnStart-1,rowStart-1] == "@" && columnTo == columnStart-2 && rowTo == rowStart - 2)))))
{
return true;
} else return false;
}
//if selected piece is black check if move is legal
public bool IsLegalBlack(int columnStart, int rowStart,int columnTo, int rowTo)
{
bool movingLeft = MovingLeft(columnStart, columnTo);
if(//columnTo and rowTo is empty and piece is not moving to same row and column
(board.Grid[columnTo,rowTo] == " " && rowTo != rowStart && columnTo != columnStart)
//and piece is moving right and is moving 1 right and 1 down or piece 1 down and 1 right from start is enemy and piece is moving 2 right and two down
&& ((!movingLeft && ((columnTo == columnStart+1 && rowTo == rowStart + 1) || (board.Grid[columnStart+1,rowStart+1] == "O" && columnTo == columnStart+2 && rowTo == rowStart + 2)))
//or piece is moving left and is moving 1 left and 1 down or piece 1 down and 1 left from start is enemy and piece is moving 2 left and two down
|| (movingLeft && ((columnTo == columnStart -1 && rowTo == rowStart + 1) || (board.Grid[columnStart-1,rowStart+1] == "O" && columnTo == columnStart-2 && rowTo == rowStart + 2)))))
{
return true;
} else return false;
}
//checks if piece is moving left so that if a piece is on the side of the board there isn't an out of bounds exception if logic checks beyond the board
public bool MovingLeft(int columnStart,int columnTo)
{
//if moving to greater column return true
if(columnStart > columnTo)
{
return true;
}
else
{
return false;
}
}
}
}
8 changes: 8 additions & 0 deletions Checkpoint2/checkpoint2.csproj
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<Project Sdk="Microsoft.NET.Sdk">

<PropertyGroup>
<OutputType>Exe</OutputType>
<TargetFramework>netcoreapp2.1</TargetFramework>
</PropertyGroup>

</Project>