c语言小游戏源代码贪吃蛇

### C语言实现的贪吃蛇游戏完整源码示例

以下是基于提供的参考资料整理的一个完整的C语言版本的贪吃蛇游戏源代码：

#include <stdio.h>
#include <conio.h>    // For _kbhit() and getch()
#include <windows.h>  // For Sleep()

#define WIDTH 20
#define HEIGHT 20
#define SNAKE_SIZE 10
#define SPEED 100     // Speed of the game, lower is faster

int gameOver;
char board[HEIGHT][WIDTH];
int snakeX[SNAKE_SIZE], snakeY[SNAKE_SIZE]; // Snake coordinates array
int fruitX, fruitY;
int nTail;
enum eDirection { STOP = 0, LEFT, RIGHT, UP, DOWN };
enum eDirection dir;

void Setup() {
    int i;
    gameOver = 0;
    dir = STOP;
    nTail = 3; // Initial length of snake
    
    // Initialize snake position at center
    for (i = 0; i < nTail; ++i) {
        snakeX[i] = WIDTH / 2 - i;
        snakeY[i] = HEIGHT / 2;
    }
    
    // Place first piece of food randomly on grid
    srand(time(0));
    fruitX = rand() % WIDTH;
    fruitY = rand() % HEIGHT;
}

void Draw() {
    system("cls"); // Clear screen before drawing new frame
    for (int row = 0; row < HEIGHT; ++row) {
        for (int col = 0; col < WIDTH; ++col) {
            if (row == 0 || row == HEIGHT - 1 || col == 0 || col == WIDTH - 1)
                printf("#");
            else if (row == snakeY[0] && col == snakeX[0])
                printf("O"); // Head of snake
            else {
                int printed = 0;
                for (int z = 1; z < nTail; z++) {
                    if (snakeX[z] == col && snakeY[z] == row) {
                        printf("o"); // Body part of snake
                        printed = 1;
                    }
                }
                if (!printed) {
                    if (fruitY == row && fruitX == col)
                        printf("*"); // Food item
                    else
                        printf(" ");
                }
            }
        }
        printf("\n");
    }

    for (int i = 0; i < WIDTH + 2; ++i)
        printf("#");
    printf("\nScore: %d\n", nTail);
}

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': // Exit key
                gameOver = 1;
                break;
        }
    }
}

void Logic() {
    int prevX = snakeX[0];
    int prevY = snakeY[0];
    int prev2X, prev2Y;
    snakeX[0] = snakeX[0] + ((dir == RIGHT ? 1 : 0) - (dir == LEFT ? 1 : 0));
    snakeY[0] = snakeY[0] + ((dir == DOWN ? 1 : 0) - (dir == UP ? 1 : 0));

    // Check collision with walls or self
    if(snakeX[0] >= WIDTH || snakeX[0] < 0 ||
       snakeY[0] >= HEIGHT || snakeY[0] < 0 ||
       IsCollisionWithSelf(prevX, prevY))
           gameOver = 1;

    // Move body parts one by one following head movement
    for(int i=1;i<nTail;i++){
        prev2X = snakeX[i];
        prev2Y = snakeY[i];
        snakeX[i]=prevX;
        snakeY[i]=prevY;
        prevX = prev2X;
        prevY = prev2Y;
    }

    // Grow when eating a fruit
    if(snakeX[0]==fruitX&&snakeY[0]==fruitY){
        nTail++;
        fruitX=rand()%WIDTH;
        fruitY=rand()%HEIGHT;
    }
}

// Helper function to check collisions between snake's segments
int IsCollisionWithSelf(int x, int y) {
    for(int i=1;i<nTail;i++)
        if(x==snakeX[i]&&y==snakeY[i]) return 1;
    return 0;
}

int main(){
    Setup();
    while(!gameOver){
        Draw();
        Input();
        Logic();
        Sleep(SPEED); // Control speed using Sleep from windows.h library[^3]
    }
}

这段代码实现了基本功能，包括初始化设置、绘制界面、处理输入以及逻辑更新。通过`Sleep()`函数可以调节游戏的速度。