#include <stdio.h>
#include <stdlib.h>
#include <conio.h>

int position_x, position_y;
int bullet_x, bullet_y;
int enemy_x, enemy_y;
int high, width;

void startup()
{
	high = 20;
	width = 30;
	position_x = high / 2;
	position_y = width / 2;
	bullet_x = 0;
	bullet_y = position_y;
}

void show()
{
	system("cls");
	int i, j;
	for(i = 0; i < high; i++)
	{
		for(j = 0; j < width; j++)
		{
			if((i == position_x) && (j == position_y))
				printf("*");
			else if((i == enemy_x) && (j == enemy_y))
				printf("@");
			else if((i = bullet_x) && (j == bullet_y))
				printf("|");
			else
				printf(" ");
		}
		printf("\n");
	}
}

void updateWithoutInput()
{
	if(bullet_x > -1)
		bullet_x--;
}

void updateWithInput()
{
	char input;
	if(kbhit())
	{
		input = getch();
		if(input == 'a')
			position_y--;
		if(input == 'd')
			position_y++;
		if(input == 'w')
			position_x--;
		if(input == 's')
			position_x++;
		if(input == ' ')
		{
			bullet_x = position_x - 1;
			bullet_y = position_y;
		}
	}
}

int main ()
{
	startup();
	while(1)
	{
		show();
		updateWithoutInput();
		updateWithInput();
	}
	return 0;
}