C++ 3A 游戏：贪吃蛇示例

#include #include <conio.h> #include <windows.h>

using namespace std;

bool gameOver; const int width = 20; const int height = 20; int x, y, fruitX, fruitY, score; int tailX[100], tailY[100]; int nTail; enum eDirection { STOP = 0, LEFT, RIGHT, UP, DOWN }; eDirection dir;

void Setup() { gameOver = false; dir = STOP; x = width / 2; y = height / 2; fruitX = rand() % width; fruitY = rand() % height; score = 0; }

void Draw() { system("cls"); for (int i = 0; i < width + 2; i++) cout << "#"; cout << endl;

for (int i = 0; i < height; i++) {
    for (int j = 0; j < width; j++) {
        if (j == 0)
            cout << "#";
        if (i == y && j == x)
            cout << "O";
        else if (i == fruitY && j == fruitX)
            cout << "F";
        else {
            bool printTail = false;
            for (int k = 0; k < nTail; k++) {
                if (tailX[k] == j && tailY[k] == i) {
                    cout << "o";
                    printTail = true;
                }
            }
            if (!printTail)
                cout << " ";
        }

        if (j == width - 1)
            cout << "#";
    }
    cout << endl;
}

for (int i = 0; i < width + 2; i++)
    cout << "#";
cout << endl;
cout << "Score: " << score << endl;

}

void Input() { if (_kbhit()) { switch (_getch()) { case 'a': dir = LEFT; break; case 'd': dir = RIGHT; break; case 'w': dir = UP; break; case 's': dir = DOWN; break; case 'x': gameOver = true; break; } } }

void Logic() { int prevX = tailX[0]; int prevY = tailY[0]; int prev2X, prev2Y; tailX[0] = x; tailY[0] = y; for (int i = 1; i < nTail; i++) { prev2X = tailX[i]; prev2Y = tailY[i]; tailX[i] = prevX; tailY[i] = prevY; prevX = prev2X; prevY = prev2Y; }

switch (dir) {
    case LEFT:
        x--;
        break;
    case RIGHT:
        x++;
        break;
    case UP:
        y--;
        break;
    case DOWN:
        y++;
        break;
    default:
        break;
}

if (x >= width)
    x = 0;
else if (x < 0)
    x = width - 1;

if (y >= height)
    y = 0;
else if (y < 0)
    y = height - 1;

for (int i = 0; i < nTail; i++) {
    if (tailX[i] == x && tailY[i] == y) {
        gameOver = true;
        break;
    }
}

if (x == fruitX && y == fruitY) {
    score += 10;
    fruitX = rand() % width;
    fruitY = rand() % height;
    nTail++;
}

}

int main() { Setup(); while (!gameOver) { Draw(); Input(); Logic(); Sleep(10); // 控制游戏速度 } return 0;