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

#define HIGH 20  
#define WIDTH 30  
#define NUM 10  

int position_x, position_y;  
int bullet_x, bullet_y;  
int enemy_x, enemy_y;  
int score;  

void gotoxy(int x, int y) 
{
    HANDLE handle = GetStdHandle(STD_OUTPUT_HANDLE);
    COORD pos;
    pos.X = x;
    pos.Y = y;
    SetConsoleCursorPosition(handle, pos);
}

void HideCursor()  
{
    CONSOLE_CURSOR_INFO cursor_info = { 1, 0 };
    SetConsoleCursorInfo(GetStdHandle(STD_OUTPUT_HANDLE), &cursor_info);
}

void startup()
{
    position_x = HIGH / 2; 
    position_y = WIDTH / 2; 
    bullet_x = -1;
    bullet_y = position_y;
    enemy_x = 0;
    enemy_y = position_y;
    score = 0;
}

void show()
{
    gotoxy(0, 0); 
    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 == bullet_x && j == bullet_y)
            {
                printf("|");
            }
            else if (i == enemy_x && j == enemy_y)
            {
                printf("@");
            }
            else
            {
                printf(" ");
            }
        }
        printf("\n");
    }
    printf("得分：%d", score);
}

void updateWitoutIput()
{
    if (bullet_x > -1) 
    {
        bullet_x--;
    }
    if (bullet_x == enemy_x && bullet_y == enemy_y) 
    {
        score++;  
        enemy_x = -1;   
        enemy_y = rand() % WIDTH;
        bullet_x = -1;  
    }
    static int speed = 0; 
    if (speed < NUM)  
    {
        speed++;
    }
    else
    {
        enemy_x++;
        speed = 0;
    }
    if (enemy_x > HIGH)  
    {
        enemy_x = -1; 
        enemy_y = rand() % WIDTH;
    }
}

void updateWithInput()
{
    char input;
    if (_kbhit())
    {
        input = _getch();
        if (input == 'w')
            position_x--;
        if (input == 's')
            position_x++;
        if (input == 'a')
            position_y--;
        if (input == 'd')
            position_y++;
        if (input == ' ')
        {
            bullet_x = position_x - 1;
            bullet_y = position_y;
        }
    }
}
int main()
{
    startup();
    HideCursor();
    srand((unsigned)time(NULL));
    while (1)
    {
        show();
        updateWitoutIput();
        updateWithInput(); 
    }
    system("pause");
    return 0;
}