Troubles trying to convert string to char[][] - c++

Question

I'm building a class named Board, that will get it's details from a txt file.
#define ROW 25;
#define COL 80;
class Board
{
char _board[ROW][COL] = {0};
public:
Board(string name); // our new constructor - reads map from file.
};
It receives string name, and tries to open a file with the specific name.
In case we are indeed in the right file, I want to read the chars from it, and copy them into a board.
I've been trying several things, that are summed up in this code:
#include <iostream>
#include <fstream>
#include <string>
#include <sstream>
Board::Board(string name)
{
string line;
ifstream file(name);
int i = 0;
if (file.is_open())
{
while (!file.eof())
{
(1) getline(file, line);
(2) const char* test = line.c_str();
(3) strcpy_s(_board[i], test);
(4) _board[i] = line;
i++;
}
// MORE FUNCTIONS NOT RELEVANT TO THIS QUESTION
}
}
I get the following errors:
For (3): The program crashes.
For (4): expression must be a modifiable lvalue.
For (1), (2): test and line are worked well.
Is there any other simplier way to copy string to char* without using ugly loops, and copy every single char?
Why is (3) crashing my program?
Thanks in advance!

Answer 1

Unrelated, but void main() had been deprecated for ages and is incorrect in current versions of the standard: it shall be int main()...
Next while (!file.eof()) is a common but terrible thing: eof becomes true only after a reading operation returned nothing. That means that you will process the last line twice...
For your errors:
(4) _board[i] is an array, and an array cannot be on the left size of an assignment (idiomatically: it is not a lvalue)
(3): strcpy_s is not a drop-in replacement for strcpy and your compiler should have emit warnings (any correct compiler would have...). It should be:
strcpy_s(_board[i], COL, test);

Answer 2

#include <iostream>
#include <fstream>
#include <string>
#define ROW 25;
#define COL 80;
int i=0;
class Board
{
char _board[ROW][COL] = {0};
public:
Board(string name); // our new constructor - reads map from file.
};
Board::Board(string name)
{
fstream newfile;
newfile.open(name,ios::in);
if (newfile.is_open()){
string tp;
while(getline(newfile, tp)){
strcpy(_board[i], tp);
i++;
}
newfile.close();
}
}