How to class

[Smac89]

So I have this code that is supposed to read from a file. The file depicts a city (sort of) with each item in the file representing a city block. And depending on what character is shown, it is supposed to put it into a class called map and in an object in the class called block set some of it's attributes to distinguish it. Here is what I have for the class Map:

class Map
{
    struct coord
    {
        int x;
        int y;
    };
public:
    struct Block
    {
        char what;//what is on this block?
        coord Coordinate;//coordinates of the block
        void SetBlock (char, int, int);
    };
};

void Map::Block::SetBlock(char w, int MSCX, int MSCY)
{
    what = w;
    Coordinate.x = MSCX;
    Coordinate.y = MSCY;
}

Here is the map:

. . * . . . . . . . . . . . . . . . . .
. . . * . . . . . . . . . . . . . . . .
. . . * . A . . . . . . . . * * * . . .
. . . . * . . . . . . . . . * B . . . .
. . . . . * . . . . . . . . * * * . . .
. . . . . . . . . . . . . . . . . . . .
. . . . . * * . . . . . . . . . . . . *
. . . . . . . * * . . . . . . . . . * .
. . . C . . . . . * . . . . . . . * . .
. . . . . . . . . . * . . . . . . . * .
. . . . * * * * . . . . . . . . . . * .
. . . . * * * * . . . * . . . . . . . .
. . . * . . . . . . . . * * . . * . . .
. . . * . . . . . . . . . . * * . . . .
. . . * . . . . D . . . . . . . . . . .
. . . * . . . . . . . . . . . . . . . .
. . . * . . . . . . . . . . . . . . . .
. . . * . . . . . . . . . . . . . . . .
. . . * . . . . . . . . . . . . E . . .
. . . . . . . . . . . . . . . . . . . .

Here it is with a bit more clarity:

1 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 0 1 A 1 1 1 1 1 1 1 1 0 0 0 1 1 1
1 1 1 1 0 1 1 1 1 1 1 1 1 1 0 B 1 1 1 1
1 1 1 1 1 0 1 1 1 1 1 1 1 1 0 0 0 1 1 1
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 0 0 1 1 1 1 1 1 1 1 1 1 1 1 0
1 1 1 1 1 1 1 0 0 1 1 1 1 1 1 1 1 1 0 1
1 1 1 C 1 1 1 1 1 0 1 1 1 1 1 1 1 0 1 1
1 1 1 1 1 1 1 1 1 1 0 1 1 1 1 1 1 1 0 1
1 1 1 1 0 0 0 0 1 1 1 1 1 1 1 1 1 1 0 1
1 1 1 1 0 0 0 0 1 1 1 0 1 1 1 1 1 1 1 1
1 1 1 0 1 1 1 1 1 1 1 1 0 0 1 1 0 1 1 1
1 1 1 0 1 1 1 1 1 1 1 1 1 1 0 0 1 1 1 1
1 1 1 0 1 1 1 1 D 1 1 1 1 1 1 1 1 1 1 1
1 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1 E 1 1 1
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

Now my problem is how do I implement this? I want to have an array of blocks because I don't want to implement each block one at a time (obv). So how would I use a for loop and depending on what character is read set the attribute of each character?

If it helps, the letters in the block represent firestations, the dot represents a block with no obstacles and a star represents a block with obstacles

If you happen to have a better way of solving this, show me please. Thank you!

[ajh32]

Are you sure you're not supposed to use the std::map to store your instances of Block inside? The way you have designed the Map class means that you will have a seperate instance of Map each containing a single Block?

If I were you I would use somthing like:

#include <map>

using namespace std;

struct coord
{
	coord(int _x, int _y)
		: x(_x), y(_y)
	{
	}

	int x, y;
};

struct Block
{
public:
	Block(char _what, coord _coordinate)
		: what(_what), coordinate(_coordinate)
	{
	}

	char what;
	coord coordinate;
};

typedef map<int, Block*> MAP_TYPE;	// you probably want somthing other than int for key, but will do for now

int main()
{
	MAP_TYPE mymap;

	// to do read file
	
	// get number of elements from file
	int element_count(100);	// currently some random number which needs to be read from file

	// read data from file
	for (int n = 0; n < element_count; ++n)
	{
		char c('a');		// get from file item
		coord crd(0,0);	// get from file item
		int key('k');		// get from file item

		Block* block = new Block(c, crd);
		mymap.insert(MAP_TYPE::value_type(key, block));
	}

	//
	// do our stuff
	//


	// delete memory allocated on heap:
	for (MAP_TYPE::iterator itr = mymap.begin(); itr != mymap.end(); ++itr)
	{
		if (itr->second)
		{
			delete itr->second;
			itr->second = NULL;
		}
	}

	return 0;
}