how can i make an input by the user which places ships on the grid

namespace battleships20
{
enum seastate
{
EmptySea,
Attacked,
Battleship,
Cruiser,
Submarine,
Destroyer
};

class BattleShipsPlayer
{
const int SEA_WIDTH = 10;
const int SEA_HEIGHT = 10;
static int[,] sea = new int[SEA_WIDTH, SEA_HEIGHT];

static void clearSea()
{
// Clears the sea to empty
}
static void placeShips()
{

// Places ships as follows:
// Battleship: (0,2) and (1,6)
// Cruiser: (0,4), (1,0) and (9,9)
// Submarine: (5,5)
// Rowing boat7,8)
}
static void displaySea()
{


}
// Displays the sea on the users screen

static void Main(string[] args)
{

{
string userName;

Console.Write("Please Enter your Name: ");

userName = Console.ReadLine();



Console.WriteLine("");

//On the next line, display the input.

//{0} is where the variable value will go. It

//is followed by a comma and variable name userName

Console.WriteLine("Hello {0}!", userName);

Console.WriteLine("Enter the coordinates of your ship");

//The Console.Readline will pause the program until you
{

for (int x = 0; x < SEA_WIDTH; x++)
{

for (int y = 0; y < SEA_HEIGHT; y++)
{

Console.Write(sea[x, y]);

Console.Write("\t");

}

Console.WriteLine();

{

}
}

{

}
}
}
}
}
}