THU大作业，贪食，C...

snake.c

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

#define roof(a, b) (a+b)%b

/*
  记得改掉！！ 
  Name: 贪食蛇 
  Copyright: 无 
  Author: 麦萌 
  Date: 07-06-13 16:34
  Description: 一个很弱的贪食蛇游戏。。。太弱了以至于刷新都卡>___> 
*/

/** 游戏场地, 20x30的 **/ 
int field[20][30];

/** 游戏状态 
	0 - 欢迎界面
	1 - 游戏中
	2 - 高分榜
**/ 
int gameState = 0;

/** 蛇面对的方向 
	0 - 上
	1 - 下
	2 - 左
	3 - 右 
**/ 
int snakeFace = 0, faceUpdated = 0;
int snakeX = 0, snakeY = 0; 
int score = 0;

void printWelcome(){
	/** 输出欢迎文字 **/ 
	if(gameState != 0)
		return;
	printf("===贪食蛇===\n");
	printf("(1) 进入游戏\n");
	printf("(2) 高分排行榜\n");
	printf("(3) 退出游戏\n");
	printf("请按下相应的数字键来选择模式：");
}

void printField(){
	/** 绘制场地 **/ 
	system("cls");
	for(int i = 0; i <= 20; i++){
		for(int j = 0; j < 30; j++){
			if( i == 20 ){
				printf("一");
				continue;
			}
			if(field[i][j] == 0){
				printf("　");
			}else if(field[i][j] > 0){
				printf("口");
			}else{
				printf("〇");
			}
		}
		printf("|\n");
	}
	printf("按键：w - 上 | a - 左 | s - 下 | d - 右 | ESC - 退出到主屏\n");
	printf("得分：%i", score);
}

void appendScore(){
	FILE *fp;
	fp = fopen("results.dat","a");
	if(fp == NULL){
		printf("没办法写入文件，请检查磁盘可写并且你有权限！\n");
		return;
	}
	fprintf(fp, "%d\n",score);
	fclose(fp);
}

void snakeDie(){
	system("cls");
	appendScore();
	printf("================\n");
	printf("啊啦，你死了。你得到了 %i 分\n 按任意键重新开始游戏...\n", score);
	for(int i = 0; i < 20; i++)
		for(int j = 0; j < 20; j++)
			field[i][j] = 0;
	score = 0;
	snakeFace = 0;
	snakeX = 0;
	snakeY = 0;
	gameState = 0;
	printf("================\n");
	getch();
}

void generatePellet(){
	if(score < 450){
		/** 蛇长小于场地75%的时候，随即选食物点 **/
		srand(time(NULL));
		int xycoords = rand() % 600;
		int x = xycoords / 20;
		int y = xycoords % 20;
		
		while(field[y][x] != 0){
			/** 有东西了，重新生成新的坐标 **/
			xycoords = rand() % 600;
			x = xycoords / 20;
			y = xycoords % 20;	
		}
		field[y][x] = -1;
	}else{
		/** 蛇长大于场地75%了，随机选择可能会产生很多冲撞
			所以只从剩下的空里面选择
		 **/
		int totalSpaces = 0;
		for(int i = 0; i < 20; i++)
			for(int j = 0; j < 30; j++){
				if(field[i][j] == 0)
					totalSpaces++;
			}
		if(totalSpaces == 0)
			return; /** 卧槽！你TM玩赢了？！ **/
		 
		/** 从空余的个数里面选一个 **/
		int spaceSelected = rand() % totalSpaces;
		for(int i = 0; i < 20; i++)
			for(int j = 0; j < 30; j++){
				totalSpaces--;
				if(totalSpaces == spaceSelected)
					field[i][j] = -1;
			} 
	}
}

void moveSnakeBody(){
	/** 搜索蛇的尾巴并删掉 **/
	int tailX = snakeX, tailY = snakeY, lastX = -1, lastY = -1;
	while(field[tailY][tailX] > 1){
		int ptr = field[tailY][tailX];
		lastX = tailX; 
		lastY = tailY;
		tailX = (ptr - 2) / 20;
		tailY = (ptr - 2) % 20;
	}
	field[tailY][tailX] = 0;
	if(lastX >= 0 && lastY >= 0)
		field[lastY][lastX] = 1;
}

void moveSnake(){
	/** 移动蛇体 **/
	bool grow = false;
	switch(snakeFace){
		case 0:
			if(field[roof(snakeY - 1,20)][snakeX] < 0)
				grow = true;
			else if(field[roof(snakeY - 1,20)][snakeX] > 0){
				snakeDie();
				return;
			}
			field[roof(snakeY - 1,20)][snakeX] = snakeX * 20 + snakeY + 2;
			snakeY = roof(snakeY - 1,20);
			
			break;
		case 1:
			if(field[roof(snakeY + 1,20)][snakeX] < 0)
				grow = true;
			else if(field[roof(snakeY + 1,20)][snakeX] > 0){
				snakeDie();
				return;
			}
			field[roof(snakeY + 1,20)][snakeX] = snakeX * 20 + snakeY + 2;
			snakeY = roof(snakeY + 1,20);
			break;
		case 2:
			if(field[snakeY][roof(snakeX - 1,30)] < 0)
				grow = true;
			else if(field[snakeY][roof(snakeX - 1,30)] > 0){
				snakeDie();
				return;
			}
			field[snakeY][roof(snakeX - 1,30)] = snakeX * 20 + snakeY + 2;
			snakeX = roof(snakeX - 1,30);
			break;
		case 3:
			if(field[snakeY][roof(snakeX + 1,30)] < 0)
				grow = true;
			else if(field[snakeY][roof(snakeX + 1,30)] > 0){
				snakeDie();
				return;
			}
			field[snakeY][roof(snakeX + 1,30)] = snakeX * 20 + snakeY + 2;
			snakeX = roof(snakeX + 1,30);
			break; 
	}
	faceUpdated = snakeFace;
	if(!grow)
		moveSnakeBody();
	else{
		generatePellet();
		score++;
	}
}

int main(void){
	
	init: /** 老天大概会谴责我的 **/ 
	while( gameState == 0 ){
		printWelcome();
		char c = getche();
		switch(c){
			case '1':
				gameState = 1;
				goto game;
				break;
			case '2':
				gameState = 2;
				goto highscore;
				break;
			case '3':
				return 0;
			default:
				printf("\n您的输入'%c'有误，请重新输入！\n\n", c);
		}	
	}
	
	highscore:
	while( gameState == 2 ){
		printf("\n\n下面是最高分TOP 10\n================\n");
		FILE *fp;
		fp = fopen("results.dat", "r");
		if(fp == NULL){
			printf("呵呵，没记录。\n");
		}else{
			int scores[2048], i, cur = 0;
			
			while(fscanf(fp, "%d\n", &i) == 1){
				scores[cur] = i;
				cur++;
			}
			
			//Sort the scores
			for(int a = 1; a < cur; a++){
				int val = scores[a];
				int hole = a;
				while(hole > 0 && val > scores[hole - 1]){
					scores[hole] = scores[hole - 1];
					hole--;
				}
				scores[hole] = val;
			}
			
			for(int a = 0; a < (cur > 10? 10: cur); a++){
				printf("%d: 得分 %d\n", a+1, scores[a]);
			}
			
			fclose(fp);
		}
		printf("==============\n输入任意键返回菜单...\n");
		char k = getch();
		switch(k){
			default:
				gameState = 0;
				goto init;
		}
	}
	goto init;
	
	game:
	/** 初始化蛇 **/ 
	field[9][14] = 1;
	snakeX = 14;
	snakeY = 9;
	generatePellet();
	clock_t tlast = clock(), tcurr;
	while( gameState == 1 ){
		tcurr = clock();
		clock_t tdiff = tcurr - tlast;
		if(tdiff > 500){
			/** 500ms 绘制场地 **/ 
			tlast = tcurr;
			printField();
			moveSnake();
		}
		
		if( kbhit() ){
			/** 抓键盘 **/ 
			char ch = getch();
			switch(ch){
				case 'w':
					if(faceUpdated > 1)
						snakeFace = 0;
					break;
				case 'a':
					if(faceUpdated < 2)
						snakeFace = 2;
					break;
				case 's':
					if(faceUpdated > 1)
						snakeFace = 1;
					break;
				case 'd':
					if(faceUpdated < 2)
						snakeFace = 3;
					break;
				case 27:
					system("cls");
					appendScore();
					printf("========\n分数已经保存，按任意键返回主菜单...\n========\n");
					gameState = 0;
					getch();
					goto init;/** 老天要谴责我了 **/ 
					break;
			}
		}
	}
	goto init;

	return 0;
}

代码不错，就是屏幕的刷新好蛋疼= =，难道真要用OpenGL之类的东西来写？

嗯。。。命令行+Windows下目测没什么别的办法。。。
Linux下能用curses做出更好的刷新。
简单的贪食蛇SDL就可以写，做成3D的话也可以用SDL或者原生写 OpenGL（蛋疼）。。。