用c语言编写一个贪吃蛇小游戏

当然可以！下面是一个简单的贪吃蛇游戏的C语言代码示例：

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

int width = 20, height = 20;
int gameover, score;
int x, y, fruitX, fruitY, flag;

int tailX[100], tailY[100];
int countTail = 0;

void setup()
{
    gameover = 0;
    x = width / 2;
    y = height / 2;

    label1:
    fruitX = rand() % width;
    if (fruitX == 0)
        goto label1;

    label2:
    fruitY = rand() % height;
    if (fruitY == 0)
        goto label2;

    score = 0;
}

void draw()
{
    system("cls");
    int i, j;
    for (i = 0; i < width; i++)
    {
        for (j = 0; j < height; j++)
        {
            if (i == 0 || i == height - 1 || j == 0 || j == width - 1)
                printf("#");
            else
            {
                if (i == x && j == y)
                    printf("O");
                else if (i == fruitX && j == fruitY)
                    printf("F");
                else
                {
                    int isTail = 0;
                    for (int k = 0; k < countTail; k++)
                    {
                        if (i == tailX[k] && j == tailY[k])
                        {
                            printf("o");
                            isTail = 1;
                        }
                    }
                    if (!isTail)
                        printf(" ");
                }
            }
        }
        printf("\n");
    }
    printf("Score: %d", score);
    printf("\n");
    printf("Press X to quit the game");
}

void input()
{
    if (_kbhit())
    {
        switch (_getch())
        {
        case 'a':
            flag = 1;
            break;
        case 's':
            flag = 2;
            break;
        case 'd':
            flag = 3;
            break;
        case 'w':
            flag = 4;
            break;
        case 'x':
            gameover = 1;
            break;
        }
    }
}

void algorithm()
{
    int prevX = tailX[0];
    int prevY = tailY[0];
    int prev2X, prev2Y;
    tailX[0] = x;
    tailY[0] = y;

    for (int i = 1; i < countTail; i++)
    {
        prev2X = tailX[i];
        prev2Y = tailY[i];
        tailX[i] = prevX;
        tailY[i] = prevY;
        prevX = prev2X;
        prevY = prev2Y;
    }

    switch (flag)
    {
    case 1:
        y--;
        break;
    case 2:
        x++;
        break;
    case 3:
        y++;
        break;
    case 4:
        x--;
        break;
    }

    if (x < 0 || x >= width || y < 0 || y >= height)
        gameover = 1;

    for (int i = 0; i < countTail; i++)
    {
        if (x == tailX[i] && y == tailY[i])
            gameover = 1;
    }

    if (x == fruitX && y == fruitY)
    {
        label3:
        fruitX = rand() % width;
        if (fruitX == 0)
            goto label3;

        label4:
        fruitY = rand() % height;
        if (fruitY == 0)
            goto label4;

        score += 10;
        countTail++;
    }
}

int main()
{
    int m, n;
    char c;
    printf("Enter the screen resolution (e.g. 80 25): ");
    scanf("%d %d", &m, &n);
    width = m;
    height = n;

    setup();
    while (!gameover)
    {
        draw();
        input();
        algorithm();
        Sleep(10); // 小休眠一会儿，控制游戏速度
    }
    printf("\nGame Over!\n");
    printf("Your score: %d\n", score);
    return 0;
}

这个代码示例使用了Windows.h库中的`Sleep`函数，所以在Windows平台上编译运行可能会更好。你可以根据需要进行修改和优化。希望能对你有所帮助！