问题遇到的现象和发生背景
问题相关代码，请勿粘贴截图
运行结果及报错内容
我的解答思路和尝试过的方法
我想要达到的结果
#include <conio.h>
#include <ctime>
#include <iostream>
#define N 22
using namespace std;
int gameover;
int a,b; // 食物的坐标
int x, y;
char key;
long start;
//=======================================
//类的实现与应用initialize
//=======================================
//下面定义贪吃蛇的坐标类
class snake_position
{
public:
int x, y; //x表示行，y表示列
snake_position() {};
void initialize(int& j)//坐标初始化
{
x = 1;
y = j;
}
};
snake_position position[(N - 2) * (N - 2) + 1]; //定义贪吃蛇坐标类数组，有(N-2)*(N-2)个坐标
//下面定义贪吃蛇的棋盘图
class snake_map
{
private:
char s[N][N];//定义贪吃蛇棋盘，包括墙壁。
char direction; // 初始情况下，向右运动
int head, tail, score;
int grade, length;
int gamespeed; //前进时间间隔
bool gameauto;
public:
//定义初始化函数，将贪吃蛇的棋盘图进行初始化
snake_map(int h = 4, int t = 1, int l = 4, char d = 77, int s = 0) :length(l), direction(d), head(h), tail(t), score(s) {}
//============================================
//输出贪吃蛇棋盘信息
void initialize() //初始化函数
{
for (int i = 1; i <= 3; i++) {
s[1][i] = '*';
}
s[1][4] = '#';
for (int i = 1; i <= N - 2; i++) {
for (int j = 1; j <= N - 2; j++) {
s[i][j] = ' ';// 初始化贪吃蛇棋盘中间空白部分
}
}
for (int i = 0; i <= N - 1; i++) {
s[0][i] = s[N - 1][i] = '-'; //初始化贪吃蛇棋盘上下墙壁
}
for (int i = 1; i <= N - 2; i++) {
s[i][0] = s[i][N - 1] = '|'; //初始化贪吃蛇棋盘左右墙壁
}
}
void show_game() {
system("cls"); // 清屏
int i, j;
cout << endl;
for (i = 0; i < N; i++)
{
cout << "\t";
for (j = 0; j < N; j++)
{
cout << s[i][j] << ' '; // 输出贪吃蛇棋盘
}
if (i == 2) { cout << "\t等级：" << grade; }
if (i == 6) { cout << "\t速度：" << gamespeed; }
if (i == 10) { cout << "\t得分：" << score << "分"; }
if (i == 14) { cout << "\t暂停：按一下空格键"; }
if (i == 18) { cout << "\t继续：按两下空格键"; }
cout << endl;
}
}
int updata_game(){
gameover = 1;
key = direction;
start = clock();
while ((gameover = (clock() - start <= gamespeed)) && !_kbhit());
//如果有键按下或时间超过自动前进时间间隔则终止循环
if (gameover)
{
_getch();
key = _getch();
}
if (key == ' ')
{
while (_getch() != ' ') {};//这里实现的是按空格键暂停
}
else
{
direction = key;
}
//方向键
if (direction == 'w') {
x = position[head].x - 1; y = position[head].y;//向上
}
else if (direction == 's') {
x = position[head].x + 1; y = position[head].y;//向下
}
else if (direction == 'a') {
x = position[head].x; y = position[head].y - 1;//向左
}
else if (direction == 'd') {
x = position[head].x; y = position[head].y + 1;//向右
}
if (direction != 'w' && direction != 's' && direction != 'a' && direction != 'd') // 按键非方向键
{
gameover = 0;
}
else if (x == 0 || x == N - 1 || y == 0 || y == N - 1) // 碰到墙壁
{
gameover = 0;
}
else if (s[x][y] != ' ' && x !=a && y != b) // 蛇头碰到蛇身
{
gameover = 0;
}
else if (x == a && y == b)//吃食物，长度增加1
{
length++;
if (length >= 8 && gameauto)
{
length -= 8;
grade++;
if (gamespeed >= 200)
{
gamespeed -= 200; // 改变贪吃蛇前进速度
}
else
{
gamespeed = 100;
}
}
s[x][y] = '#'; //更新蛇头
s[position[head].x][position[head].y] = '*'; //吃食物后将原先蛇头变为蛇身
head = (head + 1) % ((N - 2) * (N - 2)); //取蛇头坐标
position[head].x = x;
position[head].y = y;
show_game();
gameover = 1;
score += grade * 20; //加分
setpoint(); //产生食物
}
else
{ // 不吃食物
s[position[tail].x][position[tail].y] = ' ';//将蛇尾置空
tail = (tail + 1) % ((N - 2) * (N - 2));//更新蛇尾坐标
s[position[head].x][position[head].y] = '*'; //将蛇头更为蛇身
head = (head + 1) % ((N - 2) * (N - 2));
position[head].x = x;
position[head].y = y;
s[position[head].x][position[head].y] = '#'; //更新蛇头
gameover = 1;
}
return gameover;
}
//随机产生食物
void setpoint(){
srand(time(0));
do
{
a = rand() % (N - 2) + 1;
b = rand() % (N - 2) + 1;
} while (s[a][b] != ' ');
s[a][b] = '*';
}
//输入选择等级
void getgrade() {
cin >> grade;
while (grade > 7 || grade < 1)
{
cout << "请输入数字1-7选择等级，输入其他数字无效" << endl;
cin >> grade;
}
switch (grade)
{
case 1: gamespeed = 1000; gameauto = 0; break;
case 2: gamespeed = 800; gameauto = 0; break;
case 3: gamespeed = 600; gameauto = 0; break;
case 4: gamespeed = 400; gameauto = 0; break;
case 5: gamespeed = 200; gameauto = 0; break;
case 6: gamespeed = 100; gameauto = 0; break;
case 7: grade = 1; gamespeed = 1000; gameauto = 1; break;
}
}
//输出等级，得分情况以及称号
void display(){
cout << "\n\t\t\t\t等级：" << grade;
cout << "\n\n\n\t\t\t\t速度：" << gamespeed;
cout << "\n\n\n\t\t\t\t得分：" << score << "分";
}
};
//====================================
//主函数部分
//====================================
int main()
{
char ctn = 'y';
int nodead;
cout << "\n\n\n\n\n\t\t\t 欢迎进入贪吃蛇游戏!" << endl;//欢迎界面;
cout << "\n\n\n\t\t\t 按任意键马上开始。。。" << endl;//准备开始;
_getch();
while (ctn == 'y')
{
system("cls"); // 清屏
snake_map snake;
snake.initialize();
cout << "\n\n请输入数字选择游戏等级：" << endl;
cout << "\n\n\n\t\t\t1.等级一：速度 1000 \n\n\t\t\t2.等级二：速度 800 \n\n\t\t\t3.等级三：速度 600 ";
cout << "\n\n\t\t\t4.等级四：速度 400 \n\n\t\t\t5.等级五：速度 200 \n\n\t\t\t6.等级六：速度 100 \n\n\t\t\t7.自动升级模式" << endl;
snake.getgrade();//获取等级
for (int i = 1; i <= 4; i++)
{
position[i].initialize(i);//初始化坐标
}
snake.setpoint(); // 产生第一个食物
do
{
snake.show_game();
nodead = snake.updata_game();
} while (nodead==0);
system("cls"); //清屏
cout << "\n\n\n\t\t\t\tGameover！\n\n" << endl;
snake.display();//输出等级/得分情况
cout << "\n\n\n\t\t 是否选择继续游戏？输入 y 继续，n 退出" << endl;
cin >> ctn;
}
system("pause");
return 0;
}
