I'm trying to make a program that uses an array to track a boat's position. Kind of like battleship but not quite that in depth. I want to have a grid of 5x5 and have spaces everywhere except where the boat is located and when the user enters a letter for which direction to move the boat it will print out the boat's new position. This is what I have so far:

#include <iostream>
using namespace std;
const int ROWS = 5;
const int COLUMNS = 5;
void Map( double[ROWS][COLUMNS] ); //declaration

int main()
{
int Map[5][5];
char direction;
cout >> "Enter a letter to move Up, Down, Left, or Right or E to Exit: ";
cin >> direction;
Map[r][c];

int x;
cin >> x;
}
//------------------------------
// plot a 5 by 5 grid with B at position r, c
void plot(int r, int c)
{
for(int i=0; i<5; i++)
{
cout<< "\n " << i;
for(int j=0; j<5; j++)
if(i == r && j == c) cout << " B"; else cout << " -";
}
}