参考文档

借鉴了这位大佬的博客及代码，键入代码后发现有很多报错，依次解决后成功运行

c++ 实现贪吃蛇（含技术难点解析和完整代码）

技术点：
C++中_kbhit()函数与_getch()函数
Windows API 坐标结构 COORD
句柄 HANDLE
获取句柄 GetStdHandle
光标的位置控 SetConsoleCursorPosition制
光标定位函数 gotoxy()与清屏函数clrscr()

报错解决

（1） warning C4244: “参数”: 从“time_t”转换到“unsigned int”，可能丢失数据
原因：一个简单的C的Hello World,如果用高版本的VS来编译，会有这种提示，这个是高版的VS默认不让使用scanf,fopen等函数,说是scanf,fopen等函数不安全,而代替其函数的是scanf_s,fopen_s等函数,后边有个"_s"的形式

解决：想要使用,可以在源文件开头加个:

#define _CRT_SECURE_NO_WARNINGS

预编时处理一下,加个宏而已,让其忽略安全检测
（2） warning C4996: ‘kbhit‘: The POSIX name for this item is deprecated.
原因：暂未得知
解决：将kbhit()改为_kbhit()，将getch()改为_getch()

（3）运行报错：

原因：变量没有初始化。

解决：随便赋个初值，注意不能与操作按键的值一致

完整代码

/*********************************************************************
程序名: 贪吃蛇
*********************************************************************/
/*********************************************************************
程序名: 贪吃蛇
*********************************************************************/
#define _CRT_SECURE_NO_WARNINGS
#include<cstdio>
#include<iostream>
#include<ctime>
#include<stdlib.h>
#include<windows.h>
#include <conio.h>
using namespace std;
#define frame_width 50
#define frame_height 25typedef struct{int x, y;
} Food;
typedef struct{int x[100], y[100], len, state;
} Snake;void gotoxy(int x, int y);  //最重要的一个函数，控制光标的位置
void print_map();
void get_newfood();//生成新食物
bool check_foodinsnake();//检查新食物有没有在蛇身上
void move_snake(); // 移动食物
void check_foodeating();//是否吃到食物
bool check_snakealive();//贪吃蛇是否还存活//需要用到的全局变量
int score;
Snake snake;
Food food;
bool check_eaten;int main()
{system("color 0B");do{printf("1:start\t2:exit\n");char com2;cin >> com2;if (com2 == '2')break;system("cls");score = 0, check_eaten = 0;print_map();//贪吃蛇的每回合运行控制while (1){check_foodeating();//system("pause");move_snake();Sleep(max(50, 300 - score));//控制速度（与长度呈反比）if (!check_snakealive())break;}printf("Game Over!\n");} while (1);
}void gotoxy(int x, int y)
{COORD pos;//COORD是一种自带结构体，表示一个字符在控制台屏幕上的坐标HANDLE han = GetStdHandle(STD_OUTPUT_HANDLE); //从标准输出设备里取出一个句柄pos.X = y, pos.Y = x;SetConsoleCursorPosition(han, pos);//定位光标的函数
}void print_map()
{//打印墙壁for (int i = 0; i<frame_height; i++){gotoxy(i, 0);printf("#");gotoxy(i, frame_width);//因为这个标记是长度，从零开始所以最后要减1printf("#");}for (int i = 0; i<frame_width; i++){gotoxy(0, i);printf("#");gotoxy(frame_height, i);printf("#");}//蛇身初始化snake.len = 3;snake.state = 'w';snake.x[1] = frame_height / 2;snake.y[1] = frame_width / 2;gotoxy(snake.x[1], snake.y[1]);printf("@");for (int i = 2; i <= snake.len; i++){snake.x[i] = snake.x[i - 1] + 1;snake.y[i] = snake.y[i - 1];gotoxy(snake.x[i], snake.y[i]);printf("@");}//打印初始食物get_newfood();//打印右边状态栏gotoxy(2, frame_width + 3);printf("WELCOME TO THE GAME OF RETRO SNAKE");gotoxy(4, frame_width + 3);printf("UP:   w");gotoxy(6, frame_width + 3);printf("DOWN: s");gotoxy(8, frame_width + 3);printf("LEFT: a");gotoxy(10, frame_width + 3);printf("RIGHT:d");gotoxy(12, frame_width + 3);printf("Your score:%d", score);gotoxy(28, frame_width + 3);printf("Made by majin");
}bool check_foodinsnake()
{for (int i = 1; i <= snake.len; i++)if (snake.x[i] == food.x&&snake.y[i] == food.y)return 1;return 0;
}void get_newfood()
{do{srand(time(0));food.x = rand() % (frame_height - 1) + 1;food.y = rand() % (frame_width - 1) + 1;} while (check_foodinsnake());gotoxy(food.x, food.y);cout << "$" << endl;
}void move_snake()
{char com = 'n';while (_kbhit())//键盘有输入com = _getch();//从控制台读取一个字符，但不显示在屏幕上//没有吃到去除蛇尾if (!check_eaten){gotoxy(snake.x[snake.len], snake.y[snake.len]);printf(" ");}//将除蛇头外的其他部分向前移动for (int i = snake.len; i>1; i--)snake.x[i] = snake.x[i - 1],snake.y[i] = snake.y[i - 1];//移动蛇头switch (com){case 'w':{if (snake.state == 's') //如果命令与当前方向相反不起作用snake.x[1]++;elsesnake.x[1]--, snake.state = 'w';break;}case 's':{if (snake.state == 'w')snake.x[1]--;elsesnake.x[1]++, snake.state = 's';break;}case 'a':{if (snake.state == 'd')snake.y[1]++;elsesnake.y[1]--, snake.state = 'a';break;}case 'd':{if (snake.state == 'a')snake.y[1]--;elsesnake.y[1]++, snake.state = 'd';break;}default: //按其余键保持状态前进{if (snake.state == 's')snake.x[1]++;else if (snake.state == 'w')snake.x[1]--;else if (snake.state == 'd')snake.y[1]++;else if (snake.state == 'a')snake.y[1]--;break;}}gotoxy(snake.x[1], snake.y[1]);printf("@");check_eaten = 0;gotoxy(frame_height, 0);
}void check_foodeating()
{if (snake.x[1] == food.x&&snake.y[1] == food.y){score += 10;check_eaten = 1;gotoxy(12, frame_width + 3);printf("Your score:%d", score);snake.len++;get_newfood();}
}bool check_snakealive()
{//检查有没有撞到墙if (snake.x[1] == 0 || snake.x[1] == frame_height - 1 || snake.y[1] == 0 || snake.y[1] == frame_width - 1)//撞墙return 0;//检查有没有吃到自己for (int i = 2; i <= snake.len; i++)if (snake.x[i] == snake.x[1] && snake.y[i] == snake.y[1])return 0;return 1;
}

运行示例