Вызов метода на struct в связанном списке

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ошибка возникает, когда мы вызываем ship_location

p_enemy. ship_location (); / / он должен отображать местоположение корабля

error. ship_location должен иметь struct/union/class слева
выражение ошибки должно иметь тип класса

Что я уже пробовал:

// 119 method declaration and call syntax.cpp 

#include "stdafx.h"
#include <iostream>
#include <ctime>
#include <cstdlib>

using namespace std;

// will return integer between high and low value
unsigned int rand_range(int high, int low)
{
	return rand() % (high - low) + low;
}

//defination of a ship 
struct enemy_space_ship
{
	int x_coordinates;
	int y_coordinates;
	int power;
	enemy_space_ship * p_next_ship;
	void ship_location()
	{
		std::cout << "x coordinates :" << x_coordinates << std::endl;
		std::cout << "y coordinates :" << y_coordinates << std::endl;
	}
};

// Will create new ship on being call and link last ship to p_next_ship pointer
enemy_space_ship * get_new_ship(enemy_space_ship * p_enemy)
{
	enemy_space_ship * p_new_ship = new enemy_space_ship;
	p_new_ship->x_coordinates = rand_range(1000, 100);
	p_new_ship->y_coordinates = rand_range(1000, 100);
	p_new_ship->power = rand_range(10, 1);
	p_new_ship->p_next_ship = p_enemy;

	return p_new_ship;
}

void searching_ship(enemy_space_ship * p_enemy, int power_limit)
{
	while (p_enemy != NULL)
	{
		if (p_enemy->power > power_limit)
		{
			// call method inside the struct to display x and y coordinates of ship
			p_enemy.ship_location(); //error is here
		}

		p_enemy = p_enemy->p_next_ship;
	}
	
	std::cout << "Seaching done !!" << std::endl;
}

int main()
{
	srand(time(NULL));
	int user_selection = 1;
	enemy_space_ship * p_enemy = NULL;
	
	// Each call create a new ship
	while (user_selection != 0)
	{
		p_enemy = get_new_ship(p_enemy);
		std::cout << "To create another ship enter any integer or ( 0 to exit ) ";
		std::cin >> user_selection;
	}

	// user will enter power and program will show all ships that are above defined power 
	std::cout << "Enter the ship power limit :";
	std::cin >> user_selection;
	searching_ship(p_enemy, user_selection);

	std::cin.ignore();
}

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