贪吃蛇贪吃蛇贪吃蛇贪吃蛇

给好盆友@cgy @hxf写的~

大概应该可能没有用C++特有的语法吧。。

#include 
#include 
#include 
#include 
using namespace std;
struct pos {//坐标点
    int x;//列
    int y;//行
};

const int X = 35;
const int Y = 18;

char screen[Y][X];

pos head{ 4,5 };//蛇头初始位置
pos foodpos{ 19, 9 }; //食物初始位置
pos body[100];//存储蛇身位置的pos数组

bool life = 1;
int score = 0;

const int speed = 1;
int moveX, moveY;//x,y坐标的增量
int lenth = 3;//蛇的初始长度
int os;//用户的输入，见get_input()函数

int get_rannum(int left, int right);
void get_input();
void hide_cursor(bool Visible);
bool food_eaten();
void update_pos();
bool is_body(int y, int x);
void fill_screen();
void draw();


int main() {
    for (int i = 0; i < lenth; i++) {
        body[i] = head;
    }
    hide_cursor(true);
    while (life) {
        get_input();
        update_pos();
        fill_screen();
        draw();
    }
}


int get_rannum(int left, int right)//返回一个[left,right]内的整型数据
{
    srand((unsigned)time(NULL));
    return (rand() % (right - left + 1)) + left;
}

void get_input() {//获取用户输入
    if (_kbhit()) os = _getch();//这一段可以直接抄
    if (char(os) == 'a') {
        moveX = -speed; moveY = 0;
    }
    if (char(os) == 'd') {
        moveX = speed; moveY = 0;
    }
    if (char(os) == 'w') {
        moveY = -speed; moveX = 0;
    }
    if (char(os) == 's') {
        moveY = speed; moveX = 0;
    }

}

void hide_cursor(bool Visible)//隐藏光标 直接抄就完事了
{
    CONSOLE_CURSOR_INFO Cursor;
    Cursor.bVisible = !Visible;
    Cursor.dwSize = sizeof(Cursor);
    HANDLE Hand = GetStdHandle(STD_OUTPUT_HANDLE);
    SetConsoleCursorInfo(Hand, &Cursor);
}

bool food_eaten() {
    if (head.x == foodpos.x && head.y == foodpos.y) {//若蛇头碰到了食物
        return true;
    }
    return false;
}

void update_pos() {//蛇的身体坐标更新,食物位置更新
    for (int i = 0; i < lenth - 1; i++) {//这是贪吃蛇实现中唯一一个需要动脑子的地方，注释说不清楚，自己想想吧~
        body[i] = body[i + 1];
    }
    body[lenth - 1] = head;
    head.x += moveX;
    head.y += moveY;
    if (food_eaten()) {
        lenth++;
        foodpos.x = get_rannum(5, 30);
        foodpos.y = get_rannum(5, 15);
    }

}

bool is_body(int y, int x) {//坐标点x,y是不是蛇的身体
    for (int i = 0; i < lenth; i++) {
        if (y == body[i].y && x == body[i].x) {
            return true;
        }
    }
    return false;
}

void fill_screen() {//填充屏幕矩阵
    for (int y = 0; y < Y; y++) {
        for (int x = 0; x < X; x++) {
            if (x == head.x && y == head.y) {
                screen[y][x] = 'O';
            }
            else if (y == 0 || y == Y - 1) {
                screen[y][x] = '-';
            }
            else if (x == 0 || x == X - 1) {
                screen[y][x] = '|';
            }
            else if (is_body(y, x))
            {
                screen[y][x] = 'o';
            }
            else if (y == foodpos.y && x == foodpos.x) {
                screen[y][x] = '%';
            }
            else {
                screen[y][x] = ' ';
            }
        }
    }
}

void draw() {//绘制图案
    system("cls");
    for (int y = 0; y < Y; y++) {
        for (int x = 0; x < X; x++) {
            printf("%c", screen[y][x]);
        }
        printf("n");
    }
}