DOS简易版C语言贪吃蛇

本文实例为大家分享了C语言实现贪吃蛇的具体代码，供大家参考，具体内容如下

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

#define WALL_LENGTH 22

#define LEFT 0x4b
#define RIGHT 0x4d
#define DOWN 0x50
#define UP 0x48 

struct Snakes{
 int x;
 int y;
 struct Snakes *prev;
 struct Snakes *next;
};

struct Food{
 int x;
 int y;
};

struct Snakes *header;
struct Snakes *tailer;
struct Food *food; 

int wall[WALL_LENGTH][WALL_LENGTH];
int direction = RIGHT;

/**/
void init();
void draw();
void move();
void doMove(int x1, int y1);
void eat();

void keydown();

void foods();
int isOver();
int isDrawSnake(int x, int y);
int isDrawFood(int x, int y);

int main(){
 init();

 while(1){

 if(isOver()){
 break;
 } 

 move();
 eat();
 draw();
  _sleep( 100 );
 keydown();

 }

 printf("GAME OVER!");

 system("pause");
}

void init(){
 int y, x;

 for(y=0; y < WALL_LENGTH; y++){
 for(x=0; x < WALL_LENGTH; x++){
 if(y == 0 || y == WALL_LENGTH - 1 || x == 0 || x == WALL_LENGTH - 1){
  wall[y][x] = 1;
 }
 }
 }

 header=(struct Snakes *)malloc(sizeof(struct Snakes));
 header->x=10;
 header->y=10;
 header->prev=NULL;

 tailer=(struct Snakes *)malloc(sizeof(struct Snakes));
 tailer->x=9;
 tailer->y=10;
 tailer->next=NULL;
 tailer->prev=header;

 header->next=tailer;

 foods();

}

void draw(){
 int y, x;

 system("cls");
 for(y=0; y < WALL_LENGTH; y++){
 for(x=0; x < WALL_LENGTH; x++){

 if(wall[y][x] == 1){
 printf("[]");
 }else if(isDrawSnake(x, y)){
 printf("[]");
 }else if(isDrawFood(x, y)){
 printf("()");
 }else{
 printf(" "); 

 }
 }
 printf("\n");
 }

}

void move(){

 switch(direction){
 case LEFT :
 doMove(-1, 0);
 break;
 case RIGHT :
 doMove(1, 0);
 break;
 case UP :
 doMove(0, -1);
 break;
 case DOWN :
 doMove(0, 1);
 break;
 }

}

void doMove(int x1, int y1){

 struct Snakes *temp_tailer = tailer->prev;

 tailer->x=header->x + x1;
 tailer->y=header->y + y1;

 tailer->next=header;
 tailer->prev->next = NULL;
 tailer->prev = NULL;

 header->prev=tailer;

 header = tailer;
 tailer = temp_tailer; 

}

void eat(){

 if(header->x == food->x && header->y == food->y){
 int x1=0, y1 =0;
 struct Snakes *temp_tailer = tailer;
 tailer=(struct Snakes *)malloc(sizeof(struct Snakes));

 switch(direction){
 case LEFT :
 x1 = -1;
 y1 = 0;
 break;

 case RIGHT :
 x1 = 1;
 y1 = 0;
 break;

 case UP :
 x1 = 0;
 y1 = -1;
 break;

 case DOWN :
 x1 = 0;
 y1 = 1;
 break;
 }

 tailer->x=temp_tailer->x + x1;
 tailer->y=temp_tailer->y + y1;
 tailer->next=NULL;
 tailer->prev=temp_tailer;

 temp_tailer->next = tailer;
 foods();
 }

}

void foods(){

 int y,x;
 struct Snakes *temp = header;

 _sleep(20);
 srand((unsigned)time(NULL));
 y=rand()%WALL_LENGTH;
 x=rand()%WALL_LENGTH; 

 if(y == 0 || y == WALL_LENGTH - 1 || x == 0 || x == WALL_LENGTH - 1 ){
 return foods();
 }

 do{
 if(temp->x == x && temp->y == y){
 return foods();
 }
 temp = temp->next;
 }while(temp != NULL);

 if(food == NULL){
 food=(struct Food *)malloc(sizeof(struct Food));
 }
 food->x = x;
 food->y = y;

}

void keydown(){
 char keycode;
 if(_kbhit()&&(keycode =_getch())) {
  switch(keycode) {
 case LEFT:
 if(RIGHT!=direction) {
  direction=LEFT;
 // move();
 // draw();
 }
 break; 

 case RIGHT:
 if(LEFT!=direction) {
  direction=RIGHT;
 // move();
 // draw();
 }
 break; 

 case UP:
 if(DOWN!=direction) {
  direction=UP;
 // move();
 // draw();
 }
 break; 

 case DOWN:
 if(UP!=direction){
  direction=DOWN;
 // move();
 // draw();
 }
 break; 

  }
 } 

}

int isDrawSnake(int x, int y){
 struct Snakes *temp = header;
 do{
 if(temp->x == x && temp->y == y){
 return 1;
 }
 temp = temp->next;
 }while(temp != NULL);
 return 0;
}

int isDrawFood(int x, int y){
 if(food->x == x && food->y == y){
 return 1;
 }
 return 0;
}

int isOver(){
 int x1=0, y1 =0;
 switch(direction){
 case LEFT :
 x1 = -1;
 y1 = 0;
 break;

 case RIGHT :
 x1 = 1;
 y1 = 0;
 break;

 case UP :
 x1 = 0;
 y1 = -1;
 break;

 case DOWN :
 x1 = 0;
 y1 = 1;
 break;
 }

 if(header->x + x1 <= 0 || header->x + x1 >= WALL_LENGTH - 1
 || header->y + y1 <= 0 || header->y + y1 >= WALL_LENGTH - 1){

 return 1;
 }
 return 0;

} 

好久没写过C语言了，随便写个贪吃蛇玩一玩，BUG不少，当记录了。

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