Im using c 11,
I need to save/load array to and from file. Its the battleship game its need to be done for both user and computer array but i have no idea how to start with this task.
I want to use code in class method to print it in file and get in front it but i go errors.
Any help or clue would be so much for me.
#include "Board.h"
#include <iostream>
#include <fstream>
Board::Board()
{
for (int i=0; i<BOARD_SIZE; i )
for (int j=0; j<BOARD_SIZE; j )
board[i][j]=WATER;
for (int i=0; i<SHIPS_NUM; i )
ship.push_back(Ship(SHIP_LENGTH[i], SHIP_NAME[i]));
}
Board::Board(const Board &oldBoard)
{
for (int i=0; i<BOARD_SIZE; i )
for (int j=0; j<BOARD_SIZE; j )
board[i][j]=oldBoard.board[i][j];
ship = oldBoard.ship;
}
// operator przypisania (kopiowanie)
Board& Board::operator=(const Board &right)
{
if (this!=&right)
{
for (int i=0; i<BOARD_SIZE; i )
for (int j=0; j<BOARD_SIZE; j )
board[i][j]=right.board[i][j];
ship = right.ship;
}
return *this;
}
int Board::getNumHits()
{
int count=0;
for (int i=0; i<BOARD_SIZE; i )
for (int j=0; j<BOARD_SIZE; j )
if (board[i][j]==HITTED)
count ;
return count;
}
void Board::printPrivateBoard()
{
std::cout<<" A B C D E F G H I J\n";
for (int i=0; i<BOARD_SIZE; i )
{
std::cout<<i<<" ";
for (int j=0; j<BOARD_SIZE; j )
{
if (board[i][j]==HITTED || board[i][j]==MISSED)
std::cout<<board[i][j]<<" ";
else
std::cout<<UNKNOWN<<" ";
}
std::cout<<std::endl;
}
}
void Board::printPublicBoard()
{
std::cout<<" A B C D E F G H I J\n";
for (int i=0; i<BOARD_SIZE; i )
{
std::cout<<i<<" ";
for (int j=0; j<BOARD_SIZE; j )
{
std::cout<<board[i][j]<<" ";
}
std::cout<<std::endl;
}
}
char Board::getSpaceValue(int x, int y)
{
return board[y][x];
}
bool Board::recordHit(int x, int y)
{
for (int i=0; i<SHIPS_NUM; i )
{
if (ship[i].recordHit(x, y))
{
board[y][x]=HITTED;
if (ship[i].isShipSunk())
std::cout<<"You sunk the "<<ship[i].getName()<<"!\n";
return true;
}
}
board[y][x]=MISSED;
return false;
}
bool Board::placeShip(int shipNum, int x, int y, bool isHorizontal)
{
if (x>=BOARD_SIZE || y>=BOARD_SIZE)
return false;
if (ship[shipNum].getX()>=0 && ship[shipNum].getY()>=0)
return false;
for (int i=0; i<ship[shipNum].getSize(); i )
{
if ((isHorizontal && board[y][x i]!=WATER) ||
(!isHorizontal && board[y i][x]!=WATER))
return false;
if ((isHorizontal && (x i)>=BOARD_SIZE) ||
(!isHorizontal && (y i)>=BOARD_SIZE))
return false;
}
for (int i=0; i<ship[shipNum].getSize(); i )
{
if (isHorizontal)
board[y][x i]=SHIP;
else
board[y i][x]=SHIP;
}
ship[shipNum].setPosition(x, y, isHorizontal);
return true;
}
void saveBoard(Board &b1,Board &b2) {
std::fstream file(FILE_NAME.c_str(),std::ios::trunc|std::ios::out);
file.close();
}
And the header file
#include <vector>
#include "Constants.h"
#include "Ship.h"
#ifndef STATKI_BOARD_H
#define STATKI_BOARD_H
class Board{
private:
char board[BOARD_SIZE][BOARD_SIZE];
std::vector<Ship> ship;
public:
Board();
Board(const Board &boardCopy);
Board& operator=(const Board &boardRight);
~Board() {return;};
int getNumHits();
void printPrivateBoard();
void printPublicBoard();
char getSpaceValue(int x, int y);
bool recordHit(int x, int y);
bool placeShip(int shipNum, int x, int y, bool isHorizontal);
void saveBoard(Board &b1,Board &b2);
};
#endif
Constants
#include <string>
#ifndef STATKI_CONSTANTS_H
#define STATKI_CONSTANTS_H
// game constants
const int SHIPS_NUM = 4;
const std::string SHIP_NAME[SHIPS_NUM] = {"Destroyer","Cruiser","Battleship","Carrier"};
const int SHIP_LENGTH[SHIPS_NUM] = {2,3,4,5};
const int TOTAL_SHIP_SPACES = 17;
const int BOARD_SIZE = 10;
const std::string FILE_NAME = "ships_board.txt";
// board constants
const char MISSED = '@';
const char HITTED = 'X';
const char UNKNOWN = '?';
const char SHIP = '_';
const char WATER = '~';
// to convert char to board position
const int LETTER_CHAR_OFFSET=65;
const int NUMBER_CHAR_OFFSET=48;
#endif //STATKI_CONSTANTS_H
Ship object
#include "Ship.h"
#include "Constants.h"
// Konstruktor inicjalizuje odrazu statek tylko wtedy
// gdy podana jest nazwa statku oraz jego wielkosc
Ship::Ship(int size, std::string name) {
shipSize = size;
shipName = name;
shipFiledSymbol = new char[shipSize];
for (int i = 0; i < shipSize ; i) {
shipFiledSymbol[i] = SHIP; // ustawia wysztkie pola statku na nie trafione
}
xCord = -1; // Nie jest jeszcze na planszy dlatego -1
yCord = -1; // Nie jest jeszcze na planszy dlatego -1
isHorizontal=true;
isSunk=false;
}
Ship::Ship(int size, std::string name, int x, int y, bool sunk, bool horizontal) {
shipSize = size;
shipName = name;
shipFiledSymbol = new char[shipSize];
for (int i = 0; i < shipSize ; i) {
shipFiledSymbol[i] = SHIP; // ustawia wysztkie pola statku na nie trafione
}
xCord = x;
yCord = y;
isSunk = sunk;
isHorizontal = horizontal;
}
// konstruktor kopiujacy
Ship::Ship(const Ship &shipCopy) {
shipSize = shipCopy.getSize();
shipName = shipCopy.getName();
shipFiledSymbol = new char[shipSize];
for (int i = 0; i < shipSize ; i) {
shipFiledSymbol[i] = SHIP; // ustawia wysztkie pola statku na nie trafione
}
xCord = shipCopy.getX();
yCord = shipCopy.getY();
isSunk = shipCopy.isShipSunk();
isHorizontal = shipCopy.isShipHorizontal();
}
// operator przypisujacy
Ship& Ship::operator=(const Ship &rightShip) {
// Jeli lewa strona nie rowna sie prawej
if (this!=&rightShip){
shipSize = rightShip.getSize();
shipName = rightShip.getName();
shipFiledSymbol = new char[shipSize];
// uswanie wczesniej zaalkowana pamieci przed nowa alokacja
if (shipSize>0){
delete [] shipFiledSymbol;
}
for (int i = 0; i < shipSize ; i) {
shipFiledSymbol[i] = SHIP; // ustawia wysztkie pola statku na nie trafione
}
xCord = rightShip.getX();
yCord = rightShip.getY();
isSunk = rightShip.isShipSunk();
isHorizontal = rightShip.isShipHorizontal();
}
return *this;
}
// destructor usuwa dynamicznie zaalokowana pamiec
Ship::~Ship()
{
if (shipSize > 0)
delete [] shipFiledSymbol;
}
int Ship::getSize() const {
return shipSize;
}
std::string Ship::getName() const {
return shipName;
}
int Ship::getX() const{
return xCord;
}
int Ship::getY() const{
return yCord;
}
bool Ship::isShipSunk() const{
return isSunk;
}
bool Ship::isShipHorizontal() const{
return isHorizontal;
}
void Ship::setPosition(int x, int y, bool horizontal) {
xCord = x;
yCord = y;
isHorizontal=horizontal;
return;
}
// funkcja zwraca informacje czy statek zostal trafiony
bool Ship::recordHit(int hitX, int hitY) {
bool checkHorizontal = isHorizontal && (hitX<xCord || hitX>= xCord shipSize || yCord != hitY);
bool checkVertical = !isHorizontal && (hitY<yCord || hitY>= yCord shipSize || xCord != hitX);
// Jezli ktorys z tych warunkow jest prawdziy to statek nie zostal trafiony
if(checkHorizontal || checkVertical)
return false;
else{
// Jesli pierwszy warunek sie nie spelni to statek jest trafiony
if(isHorizontal){
shipFiledSymbol[hitX-xCord]=HITTED;
}else{
shipFiledSymbol[hitY-yCord]=HITTED;
}
}
// Sprawdzanie czy statek zatonal
isSunk=true;
for (int i=0; i<shipSize; i )
if (shipFiledSymbol[i]==SHIP)
isSunk=false;
return true;
}
Ship header
#include <string>
#ifndef STATKI_SHIP_H
#define STATKI_SHIP_H
class Ship{
private:
char* shipFiledSymbol;
int shipSize;
int xCord,yCord;
bool isSunk;
bool isHorizontal;
std::string shipName;
public:
Ship(int size,std::string name);
Ship(int size,std::string name,int x,int y,bool sunk,bool horizontal);
Ship(const Ship &shipCopy);
Ship& operator=(const Ship &rightShip);
~Ship();
int getSize() const;
std::string getName() const;
int getX() const;
int getY() const;
bool isShipSunk() const;
bool isShipHorizontal() const;
void setPosition(int x, int y, bool horizontal);
bool recordHit(int hitX, int hitY);
};
#endif
And main file only for build to make (without i got winmain error)
int main(){
return 0;
}
CodePudding user response:
Aggregating discussion above:
To class Board
you add a <<
operator that knows how to write one Board
.
friend std::ostream & operator<<(std::ostream & out, const Board & b);
Then in Board.cpp you implement <<
as per the suggestions in What are the basic rules and idioms for operator overloading? and a couple for
loops to iterate over the 2D array
std::ostream & operator<<(std::ostream & out, const Board & b)
{
for (int row = 0; row < BOARD_SIZE; row )
{
for (int col = 0; col < BOARD_SIZE; col )
{
out << b.board[row][col] << ' ';
}
out << '\n';
}
out << '\n';
return out;
}
Now saveBoard
is ridiculously simple:
bool saveBoard(Board &b1,Board &b2) {
std::ofstream file(FILE_NAME);
file << b1 << b2;
return file.good();
}
We return bool
because you always want to let the caller know if the operation failed. If the caller doesn't use the return value, that's a bug they'll have to solve on their own. You did the best you could, though I suppose you could also throw an exception. That may or may not be excessive here.
To read it back, you do pretty much the same thing, but with the >>
operator:
friend std::istream & operator>>(std::istream & in, Board & b);
and then
std::istream & operator>>(std::istream & in, Board & b)
{
for (int row = 0; row < BOARD_SIZE; row )
{
for (int col = 0; col < BOARD_SIZE; col )
{
in >> b.board[row][col];
}
}
return in;
}
and
bool loadBoard(Board &b1,Board &b2) {
std::ifstream file(FILE_NAME);
file >> b1 >> b2;
return file.good();
}