Thread: cannot print out my 2d array correctly! please help

im trying to write a program to basically play a concentration game where you pick 2 coordinates on the 2d array and it displays. if they match it stays if not the 2d array display resets back to Xs. anyway i want my board to look like this when you start:

--1 2 3 4 5 6
1 X X X X X X
2 X X X X X X
3 X X X X X X
4 X X X X X X
5 X X X X X X
6 X X X X X X
( the -- is just a space for the thread its not in my code or whatever)
to do so i created 2 functions. one to create the board and one to display the board:

Code:

// Create display function to make 2D array
char createdisplay()
{
	char X = 'X';
	char bb[7][7] = {{0, 1, 2, 3, 4, 5, 6}, {1, X, X, X, X, X, X}, {2, X, X, X, X, X, X}, {3, X, X, X, X, X, X}, {4, X, X, X, X, X, X}, {5, X, X, X, X, X, X}, {6, X, X, X, X, X, X}};
	return bb[7][7];
}

// Display a blank board using char bb[7][7]

void DisArray(char bb[7][7])
{
	for (char x=0; x < 7; x++) {
			for (char y=0; y < 7; y++)
			cout << bb[x][y] << endl;
    }
	return;
}

now this compiles with a warning about the local variable bb. when i run it i get like 30 lines with just "[" in it and then it ends. whats wrong with my code? whats the correct code to display what i was trying to do? thanks in advance

>> char createdisplay()

>> return bb[7][7];

You create the array inside the function which in turn returns one charater only, the rest of the array goes to space when you return like that.

0 is not equal to character '0'

Code:

	char bb[7][7] = {{0, 1, 2, 3, 4, 5, 6}, {1, X, X, X, X, X, X}, {2, X, X, X, X, X, X}, {3, X, X, X, X, X, X}, {4, X, X, X, X, X, X}, {5, X, X, X, X, X, X}, {6, X, X, X, X, X, X}};

all the digits in this line of code equate to various unprintable control characters from the start of the ascii table.

you also have issues with scope as linux code pointed out. Go back and re-read the chapter on arrays and pointers in your favourite C++ book.

ok yeah i forgot about that. i messed around and if you change everything to int instead of char i get this:
0
1
2
3
4
5
6
1
88 (X)
and so on...once i fix my char/int problem how do i make it so these lines show up in multiple columns...not just one?

so that:
0 1
1 88
2 etc...
3
4
5
6

You'll need to rearrange the entire array then, or build a new "display" array from the current one.