C++控制台應用程序之貪吃蛇（改進版）

#include<iostream>
#include<stdio.h>
#include<stdlib.h>
#include<time.h>
#include<conio.h>
#include<windows.h>
using namespace std;

typedef struct{ int x, y; }Point;

char map[22][22];                        //定義一個22*22的地圖（含邊界）
Point snake[400], food, Next;            //定義蛇、食物、下一步蛇頭的位置
int head, tail;                            //用於儲存蛇頭和蛇尾的下標
int grade, length, autotime;            //游戲等級、蛇長、自動前進所需時間
char direction;                            //前進方向

//定位光標
void gotoxy(int x, int y)
{
    HANDLE hConsoleOutput;
    COORD dwCursorPosition;
    dwCursorPosition.X = x;
    dwCursorPosition.Y = y;
    hConsoleOutput = GetStdHandle(STD_OUTPUT_HANDLE);
    SetConsoleCursorPosition(hConsoleOutput, dwCursorPosition);
}

//用inline定義內聯函數節省程序運行時的調用開銷
//刷新地圖
inline void Update(char map[][22], int grade, int length, int autotime)
{
    //system("cls");                        //清屏
    gotoxy(0, 0);
    int i, j;
    printf("\n");
    for (i = 0; i < 22; i++)
    {
        printf("\t");
        for (j = 0; j < 22; j++)
            printf("%c ", map[i][j]);
        if (i == 0)
            printf("\t等級為：%d", grade);
        if (i == 2)
            printf("\t長度為：%d", length);
        if (i == 6)
            printf("\t自動前進時間");
        if (i == 8)
            printf("\t間隔為：%d ms", autotime);
        printf("\n");
    }
}

//歡迎界面
inline void hello()
{
    puts("\n\n\n\t\t\t貪吃蛇游戲即將開始！");                        //准備開始
    double start;
    for (int i = 3; i >= 0; i--)
    {
        start = (double)clock() / CLOCKS_PER_SEC;                //得到程序目前為止運行的時間
        while ((double)clock() / CLOCKS_PER_SEC - start <= 1);    //經過1秒之后
        if (i > 0)
        {
            system("cls");                                        //清屏
            printf("\n\n\n\t\t\t進入倒計時：%d\n", i);                //倒計時
        }
        else
            Update(map, grade, length, autotime);                //刷新地圖
    }
}

//隨機生成食物位置
inline void f()
{
    srand(int(time(0)));                                        //調用種子函數
    do{
        food.x = rand() % 20 + 1;
        food.y = rand() % 20 + 1;
    } while (map[food.x][food.y] != ' ');
    map[food.x][food.y] = '!';                                    //食物為“!”
}

//初始化
inline void init()
{
    int i, j;
    for (i = 1; i <= 20; i++)
        for (j = 1; j <= 20; j++)
            map[i][j] = ' ';
    for (i = 0; i <= 21; i++)
        map[0][i] = map[21][i] = map[i][0] = map[i][21] = '*';    //邊界
    map[1][1] = map[1][2] = 'O';                                //蛇身（含蛇尾）
    map[1][3] = '@';                                            //蛇頭
    head = 2; tail = 0;                                            //開始時頭和尾的下標
    snake[head].x = 1; snake[head].y = 3;                        //開始時蛇頭在地圖上的下標
    snake[tail].x = 1; snake[tail].y = 1;                        //開始時蛇尾在地圖上的下標
    snake[1].x = 1; snake[1].y = 2;                                //開始時蛇身在地圖上的下標
    f();                                                        //隨機生成食物位置
    grade = 1; length = 3; autotime = 500;                        //開始的等級、長度、自動前進時間
    direction = 77;                                                //初始的運動方向向右
}

//預前進
inline int GO()
{
    bool timeover = true;
    double start = (double)clock() / CLOCKS_PER_SEC;            //得到程序目前為止運行的時間

L:
    //自動經過1秒或者等待1秒內的鍵盤輸入
    while ((timeover = ((double)clock() / CLOCKS_PER_SEC - start <= autotime / 1000.0)) && !_kbhit());
    //鍵盤輸入
    if (timeover)
    {
        //_getch();
        char d = _getch();                                    //獲取方向
        if (d != 72 && d != 80 && d != 75 && d != 77 || direction == 72 && d == 80 || direction == 80 && d == 72 || direction == 75 && d == 77 || direction == 77 && d == 75)
            goto L;
        else
            direction = d;
    }
    switch (direction)
    {
    case 72:
        Next.x = snake[head].x - 1; Next.y = snake[head].y;        //向上
        break;
    case 80:
        Next.x = snake[head].x + 1; Next.y = snake[head].y;        //向下
        break;
    case 75:
        Next.x = snake[head].x; Next.y = snake[head].y - 1;        //向左
        break;
    case 77:
        Next.x = snake[head].x; Next.y = snake[head].y + 1;        //向右
        break;
    default:
        puts("\tGame over!");                                    //按下非方向鍵游戲失敗
        return 0;
    }
    if (Next.x == 0 || Next.x == 21 || Next.y == 0 || Next.y == 21)            //撞到邊界
    {
        puts("\tGame over!");
        return 0;
    }
    if (map[Next.x][Next.y] != ' '&&!(Next.x == food.x&&Next.y == food.y))    //吃到自己
    {
        puts("\tGame over!");
        return 0;
    }
    if (length == 400)                                                        //最長蛇長
    {
        puts("\tGood game!");
        return 0;
    }
    return 1;
}

//吃到食物
inline void EAT()
{
    length++;                                        //長度增加1
    int _grade = length / 10 + 1;                    //計算等級
    if (_grade != grade)
    {
        grade = _grade;
        if (autotime >= 100)
            autotime = 550 - grade * 50;            //增加一級自動時間減短50毫秒
    }
    map[Next.x][Next.y] = '@';                        //蛇頭位置變化
    map[snake[head].x][snake[head].y] = 'O';        //原蛇頭位置變化為蛇身
    head = (head + 1) % 400;                        //蛇頭下標加1
    snake[head].x = Next.x; snake[head].y = Next.y;    //蛇頭下標變化
    f();                                            //隨機生成食物位置
    Update(map, grade, length, autotime);            //刷新地圖
}

//沒吃到食物
inline void FAILURE()
{
    map[snake[tail].x][snake[tail].y] = ' ';        //蛇尾原來的位置變成“ ”
    tail = (tail + 1) % 400;                        //蛇尾下標加1
    map[Next.x][Next.y] = '@';                        //蛇頭位置變化
    map[snake[head].x][snake[head].y] = 'O';        //原蛇頭位置變化為蛇身
    head = (head + 1) % 400;                        //蛇頭下標加1
    snake[head].x = Next.x;                            //蛇頭下標變化
    snake[head].y = Next.y;
    Update(map, grade, length, autotime);            //刷新地圖
}

//main函數
int main()
{
    system("color F0");
    init();                    //初始化
    hello();                //歡迎界面
    while (1)
    {
        if (GO())            //預前進
        {
            if (Next.x == food.x&&Next.y == food.y)
                EAT();        //吃到食物
            else
                FAILURE();    //沒吃到食物
        }
        else
            return 0;        //失敗或者勝利，游戲結束
    }
    return 0;
}
//

 

運行結果截圖：