大家好,又见面了,我是你们的朋友全栈

效果

1. 按方向键移动
2. 按空格加速
3. 按esc暂停
4. 按两次esc退出
5. 随着蛇的长度增加,蛇移动速度加快
6. 没有屏闪

main()

int main(){    Init();//初始化while (!die){    ProcessKey();//处理按键Move();//移动蛇Judge();//碰撞检测Draw();//画图Sleep(snack.timeperstep);//延时}while (_getch() != 27);//游戏结束后按esc退出}

Init()

void Init(){    SetConsoleTitleW(L"贪吃蛇");system("MODE CON: COLS=64 LINES=32");snack.body.push_back(new COORD{     15,15});snack.body.push_back(new COORD{     14,15 });GenerateFood();}

ProcessKey()

这里有坑,方向键会产生两个键码,所以要用两次getch。方向键会先产生-32键码,然后产生72 75 77 80这四个键码中的一个

void ProcessKey(){ Direction before = snack.heading;snack.timeperstep = 1000 / snack.body.size();char ch1, ch2;while (_kbhit()){ ch1 = _getch();switch (ch1){ case VK_ESCAPE:if (_getch() == 27)exit(0);break;case -32:switch (ch2 = _getch()){ case 72://upif (Direction::down != before)snack.heading = Direction::up;break;case 80://downif (Direction::up != before)snack.heading = Direction::down;break;case 75://leftif (Direction::right != before)snack.heading = Direction::left;break;case 77://rightif (Direction::left != before)snack.heading = Direction::right;}break;case VK_SPACE:snack.timeperstep = snack.timeperstep = 300 / snack.body.size();;}}}

Move()

这里只是把头往前移动了一格

void Move(){ COORD* head = snack.body.front();switch (snack.heading){ case Direction::up:snack.body.push_front(new COORD{  head->X,head->Y - 1 });break;case Direction::down:snack.body.push_front(new COORD{  head->X,head->Y + 1 });break;case Direction::left:snack.body.push_front(new COORD{  head->X - 1,head->Y });break;case Direction::right:snack.body.push_front(new COORD{  head->X + 1,head->Y });break;}}

Judge()

判断头有没有和食物、墙、身体重叠。这里的坑就是判断身体的时候,一定要掐头去尾来判断

void Judge(){ COORD* head = snack.body.front();if (food.X == head->X && food.Y == head->Y)GenerateFood();else if (head->X < 0 || head->Y < 0 || head->X == 30 || head->Y == 30)die = true;else{ delete snack.body.back();snack.body.pop_back();for (list<COORD*>::iterator i = ++snack.body.begin(); i != snack.body.end(); i++){ if ((*i)->X == head->X && (*i)->Y == head->Y)die = true;}}}

Draw()

用缓冲,先把要输出到屏幕的东西写道缓冲区,解决屏闪。大致顺序是先画墙,再画食物,再画蛇,如果蛇死了就再画一个lost

void Draw(){ HANDLE houtbuf = CreateConsoleScreenBuffer(GENERIC_WRITE, FILE_SHARE_WRITE, NULL, CONSOLE_TEXTMODE_BUFFER, NULL);CONSOLE_CURSOR_INFO cci{  25,0 };SetConsoleCursorInfo(houtbuf, &cci);DWORD NumberOfCharsWritten;COORD coord;coord.Y = 0;for (coord.X = 0; coord.X < 64; coord.X += 2){ WriteConsoleOutputCharacterW(houtbuf, L"■", 1, coord, &NumberOfCharsWritten);}coord.Y = 31;for (coord.X = 0; coord.X < 64; coord.X += 2){ WriteConsoleOutputCharacterW(houtbuf, L"■", 1, coord, &NumberOfCharsWritten);}coord.X = 0;for (coord.Y = 0; coord.Y < 32; coord.Y++){ WriteConsoleOutputCharacterW(houtbuf, L"■", 1, coord, &NumberOfCharsWritten);}coord.X = 62;for (coord.Y = 0; coord.Y < 32; coord.Y++){ WriteConsoleOutputCharacterW(houtbuf, L"■", 1, coord, &NumberOfCharsWritten);}coord.Y = food.Y + 1;coord.X = (food.X + 1) * 2;FillConsoleOutputAttribute(houtbuf, FOREGROUND_BLUE, 2, coord, &NumberOfCharsWritten);WriteConsoleOutputCharacterW(houtbuf, L"■", 1, coord, &NumberOfCharsWritten);for (COORD* node : snack.body){ coord.X = (1 + node->X) * 2;coord.Y = 1 + node->Y;FillConsoleOutputAttribute(houtbuf, FOREGROUND_GREEN, 2, coord, &NumberOfCharsWritten);WriteConsoleOutputCharacterW(houtbuf, L"■", 1, coord, &NumberOfCharsWritten);}if (die){ coord.Y = 16;coord.X = 28;FillConsoleOutputAttribute(houtbuf, FOREGROUND_RED, 8, coord, &NumberOfCharsWritten);WriteConsoleOutputCharacterW(houtbuf, L"##LOST##", 8, coord, &NumberOfCharsWritten);die = true;}SetConsoleActiveScreenBuffer(houtbuf);}

GenerateFood()

用来生成一个和蛇身不重叠的食物

void GenerateFood(){ unfished:food.X = rand() % 30;food.Y = rand() % 30;for (COORD* node : snack.body){ if (node->X == food.X && node->Y == food.Y)goto unfished;}}

所有代码

#include <Windows.h>#include <iostream>#include <cstdlib>#include <conio.h>#include <list>using namespace std;enum Direction {  up, down, left, right };struct { list<COORD*> body;Direction heading = Direction::right;int timeperstep;}snack;COORD food;bool die;void ProcessKey(){ Direction before = snack.heading;snack.timeperstep = 1000 / snack.body.size();char ch1, ch2;while (_kbhit()){ ch1 = _getch();switch (ch1){ case VK_ESCAPE:if (_getch() == 27)exit(0);break;case -32:switch (ch2 = _getch()){ case 72://upif (Direction::down != before)snack.heading = Direction::up;break;case 80://downif (Direction::up != before)snack.heading = Direction::down;break;case 75://leftif (Direction::right != before)snack.heading = Direction::left;break;case 77://rightif (Direction::left != before)snack.heading = Direction::right;}break;case VK_SPACE:snack.timeperstep = snack.timeperstep = 300 / snack.body.size();;}}}void Draw(){ HANDLE houtbuf = CreateConsoleScreenBuffer(GENERIC_WRITE, FILE_SHARE_WRITE, NULL, CONSOLE_TEXTMODE_BUFFER, NULL);CONSOLE_CURSOR_INFO cci{  25,0 };SetConsoleCursorInfo(houtbuf, &cci);DWORD NumberOfCharsWritten;COORD coord;coord.Y = 0;for (coord.X = 0; coord.X < 64; coord.X += 2){ WriteConsoleOutputCharacterW(houtbuf, L"■", 1, coord, &NumberOfCharsWritten);}coord.Y = 31;for (coord.X = 0; coord.X < 64; coord.X += 2){ WriteConsoleOutputCharacterW(houtbuf, L"■", 1, coord, &NumberOfCharsWritten);}coord.X = 0;for (coord.Y = 0; coord.Y < 32; coord.Y++){ WriteConsoleOutputCharacterW(houtbuf, L"■", 1, coord, &NumberOfCharsWritten);}coord.X = 62;for (coord.Y = 0; coord.Y < 32; coord.Y++){ WriteConsoleOutputCharacterW(houtbuf, L"■", 1, coord, &NumberOfCharsWritten);}coord.Y = food.Y + 1;coord.X = (food.X + 1) * 2;FillConsoleOutputAttribute(houtbuf, FOREGROUND_BLUE, 2, coord, &NumberOfCharsWritten);WriteConsoleOutputCharacterW(houtbuf, L"■", 1, coord, &NumberOfCharsWritten);for (COORD* node : snack.body){ coord.X = (1 + node->X) * 2;coord.Y = 1 + node->Y;FillConsoleOutputAttribute(houtbuf, FOREGROUND_GREEN, 2, coord, &NumberOfCharsWritten);WriteConsoleOutputCharacterW(houtbuf, L"■", 1, coord, &NumberOfCharsWritten);}if (die){ coord.Y = 16;coord.X = 28;FillConsoleOutputAttribute(houtbuf, FOREGROUND_RED, 8, coord, &NumberOfCharsWritten);WriteConsoleOutputCharacterW(houtbuf, L"##LOST##", 8, coord, &NumberOfCharsWritten);die = true;}SetConsoleActiveScreenBuffer(houtbuf);}void GenerateFood(){ unfished:food.X = rand() % 30;food.Y = rand() % 30;for (COORD* node : snack.body){ if (node->X == food.X && node->Y == food.Y)goto unfished;}}void Init(){ SetConsoleTitleW(L"贪吃蛇");system("MODE CON: COLS=64 LINES=32");snack.body.push_back(new COORD{  15,15});snack.body.push_back(new COORD{  14,15 });GenerateFood();}void Move(){ COORD* head = snack.body.front();switch (snack.heading){ case Direction::up:snack.body.push_front(new COORD{  head->X,head->Y - 1 });break;case Direction::down:snack.body.push_front(new COORD{  head->X,head->Y + 1 });break;case Direction::left:snack.body.push_front(new COORD{  head->X - 1,head->Y });break;case Direction::right:snack.body.push_front(new COORD{  head->X + 1,head->Y });break;}}void Judge(){ COORD* head = snack.body.front();if (food.X == head->X && food.Y == head->Y)GenerateFood();else if (head->X < 0 || head->Y < 0 || head->X == 30 || head->Y == 30)die = true;else{ delete snack.body.back();snack.body.pop_back();for (list<COORD*>::iterator i = ++snack.body.begin(); i != snack.body.end(); i++){ if ((*i)->X == head->X && (*i)->Y == head->Y)die = true;}}}int main(){ Init();while (!die){ ProcessKey();Move();Judge();Draw();Sleep(snack.timeperstep);}while (_getch() != 27);}

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