The realization of the greedy snake game based on C language complete instance Code _c language

This article in the form of an example of the implementation of the C-language based on the greedy Snake game code, this is a more common game, the code with a more detailed comments for the reader to understand a certain degree of help.

Greedy snake complete implementation code is as follows:

#include <graphics.h> #include <conio.h> #include <stdlib.h> #include <dos.h> #define NULL 0 #def
ine up 18432 #define DOWN 20480 #define LEFT 19200 #define RIGHT 19712 #define ESC 283 #define ENTER 7181 struct snake
 {int CenterX;
 int centery;
 int newx;
 int newy;
struct Snake *next;
};

struct Snake *head;                     int grade=60;                        /* Control speed of the *******/int a,b;             * * Back static cover position/void *FAR1,*FAR2,*FAR3,*FAR4;              * * Snake body pointer back to hide the pointer worm/int size1,size2,size3,size4;                     * * * * * global variable **/int ch=right; 
/************** the key to start the snake in the direction of the right***********/int chy=right;                       int flag=0;                     /********* judge whether to exit the game **************/int control=4;                     /*********** to judge the last direction and the next direction does not conflict ***/int nextshow=1;                      /******* controls whether the next snake body shows ***************/int scenterx;
/*************** the rectangular Center coordinate ***************/int scentery;                         int SX; /******* get their value before a B is changed to ensure that theThe machine rectangle also does not appear here *******/int sy;
 /************************ is initialized **************************/void Snakede () {struct Snake *p1,*p2; 
 head=p1=p2= (struct snake *) malloc (sizeof (struct snake));
 p1->centerx=80;
 p1->newx=80;
 p1->centery=58;
 p1->newy=58;
 p1= (struct snake *) malloc (sizeof (struct snake));
 p2->next=p1;
 p1->centerx=58;
 p1->newx=58;
 p1->centery=58;
 p1->newy=58;
p1->next=null;                
/*******************end*******************/void Welcome ()/************* Game start interface, you can choose Speed **********/
 {int key;
 int size;
 int x=240;
 int y=300;
 int F; 
 void *buf;
 Setfillstyle (Solid_fill,blue);
 Bar (98,100,112,125);
 Setfillstyle (solid_fill,red);
 Bar (98,112,112,114);
 Setfillstyle (Solid_fill,green);
 Bar (100,100,110,125);
 Size=imagesize (98,100,112,125);
 Buf=malloc (size);
 GetImage (98,100,112,125,BUF);

 Cleardevice ();
 Setfillstyle (Solid_fill,blue);
 Bar (240,300,390,325);
 Outtextxy (193,310, "Speed:"); Setfillstyle (SOLid_fill,red);
 Bar (240,312,390,314);
 SetColor (yellow);
 Outtextxy (240,330, "down");
 Outtextxy (390,330, "up"); 
 Outtextxy (240,360, "ENTER to start ...");
 Outtextxy (270,200, "SNAKE");
 Fei (220,220);
 Feiyang (280,220); 
 Yang (340,220); 
 Putimage (X,y,buf,copy_put);
 SetColor (RED);
 Rectangle (170,190,410,410);
  while (1) {if (Bioskey (1))/********8 Select the speed portion ************/key=bioskey (0);
   Switch (key) {case enter:f=1;
    Break
   Case Down:if (x>=240) {putimage (x-=2,y,buf,copy_put);
   grade++;
   key=0;
    Break
   Case Up:if (x<=375) {putimage (x+=2,y,buf,copy_put);
    grade--;
   key=0;
    Break 
 } if (f==1) break;
 }/********** End ****************/free (BUF);
 /************************* the rectangle *****************//*********** Call this function when Nextshow is 1 **********/void Ran () {int NX;
 int NY;         int show;
 /********** controls whether the ***********/int jump=0 is displayed;
 struct Snake *p; p=Head
  if (nextshow==1)/*********** whether to start randomly generating ***************/while (1) {show=1;
  Randomize ();
  Nx=random (14);
  Ny=random (14);
  scenterx=nx*22+58;
   scentery=ny*22+58; while (P!=null) {if (scenterx==p->centerx&&scentery==p->centery| |
  Scenterx==sx&&scentery==sy) {show=0;
  Jump=1;
  Break 
   else p=p->next;
  if (jump==1) break;
  } if (show==1) {putimage (scenterx-11,scentery-11,far3,copy_put);
  nextshow=0;
  Break
 }}/*********** Clearance animation **************/void Donghua () {int i;
 Cleardevice ();
 SetBkColor (black);
 Randomize (); 
  while (1) {for (i=0;i<=5;i++) {putpixel (random (640), random (80), 13); 
  Putpixel (Random (640), random (80) +80,2); 
  Putpixel (Random (640), random (80) +160,3);
  Putpixel (Random (640), random (80) +240,4);
  Putpixel (Random (640), random (80) +320,1);
 Putpixel (Random (640), random (80) +400,14);
  } setcolor (yellow);
  Settextstyle (0,0,4);
  Outtextxy (130,200, "wonderful!!");
  Setfillstyle (solid_fill,10); Bar(240,398,375,420);
  Feiyang (300,400);
  Fei (250,400);
  Yang (350,400);
  if (Bioskey (1)) if (Bioskey (0) ==esc) {flag=1;
 Break
/*************************end************************//*********************** Initialization Graphics system *********************/
 void init () {int a=detect,b;
 int i,j;
Initgraph (&a,&b, ""); /***************************end****************************//*** draw a solid border effect function ******/void tline (int x1,int y1,int,
 int Y2,int White,int black) {setcolor (white);
 Line (X1,Y1,X2,Y1);
 Line (X1,Y1,X1,Y2);
 SetColor (black);
 Line (X2,Y1,X2,Y2);
 Line (X1,Y2,X2,Y2); /****end*********//************* flying Ocean Flag **********/int Feiyang (int x,int y) {int feiyang[18][18]={{0,0,0,0,0,0,1,1,1, 1,1,1,0,1,1,0,0,0}, {0,0,0,0,0,1,1,1,0,0,1,1,1,1,1,0,0,0}, {0,0,0,0,1,1,1,0,0,0,0,0,1,1,1,0,0,0}, { 0,0,0,1,1,1,0,0,0,0,0,0,0,1,1,0,0,0}, {0,0,0,1,1,0,0,0,0,0,0,1,1,0,0,0,0,0}, { 0,0,1,1,0,0,0,0,0,0,1,1,1,0,0,0,0,0}, {0,0,1,1,0,1,1,1,1,1,1,0,0,0,0,0,0,0}, {0,0,1,1,1,1,1,0,0,1,0,0,1,1,0,0,0,0}, {0,0,1,1,1,0,0,0,0,1,0,1,1,1,0,0,0,0}, {0,0,1,1,0,1,1,1,0,1,1,1,0,0,0,0,0,0}, { 0,0,1,1,0,0,0,1,0,0,1,1,0,0,0,0,0,0}, {0,0,1,1,0,0,0,1,1,0,0,1,1,0,0,1,0,0}, { 0,0,1,1,1,0,0,1,1,0,0,1,1,0,0,1,0,0}, {0,0,1,1,1,1,0,1,1,1,1,1,1,0,1,1,0,0}, { 0,0,0,1,1,1,0,1,1,1,1,1,0,0,1,0,0,0}, {0,0,0,0,1,1,1,0,0,0,0,0,0,1,1,0,0,0}, {
 0,0,0,0,0,1,1,1,0,0,0,0,1,1,0,0,0,0}, {0,0,0,0,0,1,1,1,1,1,1,1,1,0,0,0,0,0}};
int i,j;
 for (i=0;i<=17;i++) for (j=0;j<=17;j++) {if (feiyang[i][j]==1) Putpixel (j+x,i+y,red); }/******** "Fly" *************/int fei (int x,int y) {int fei[18][18]={{1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}, {0,1,1,1, 1,1,1,1,1,1,1,0,0,0,0,0,0,0}, {0,1,1,1,0,0,0,0,1,1,1,0,0,0,0,0,0,0}, {0,0,0,0,0,0,0,0,0,1,1,0,0,1,0,0,0,0}, { 0,0,0,0,0,0,0,0,0,1,1,0,0,1,1,0,0,0}, {0,0,0,0,0,0,0,0,0,1,1,0,1,1,0,0,0,0}, { 0,0,0,0,0,0,0,0,0,1,1,1,1,0,0,0,0,0}, {0,0,0,0,0,0,0,0,0,1,1,1,1,0,0,0,0,0}, { 0,0,0,0,0,0,0,0,0,1,1,0,1,1,1,0,0,0}, {0,0,0,0,0,0,0,0,0,0,1,1,0,0,1,1,0,0}, {0,0,0,0,0,0,0,0,0,0,0,1,1,0,1,1,0,0}, {0,0,0,0,0,0,0,0,0,0,0,1,1,0,0,0,0,0}, {0,0,0,0,0,0,0,0,0,0,0,0,1,1,0,0,0,0}, { 0,0,0,0,0,0,0,0,0,0,0,0,1,1,0,0,0,1}, {0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,0,1,1}, { 0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,0}, {
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,0}};
int i,j;
  for (i=0;i<=17;i++) for (j=0;j<=17;j++) {if (fei[i][j]==1) Putpixel (J+x,i+y,blue); }/********* the "Ocean" character **************/int yang (int x,int y) {int yang[18][18]={{0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0}, { 1,1,0,0,0,0,1,1,1,0,0,0,1,1,0,0,0,0}, {0,1,1,1,0,0,0,1,1,1,0,1,1,0,0,0,0,0}, { 0,0,1,1,0,0,0,0,0,1,1,1,0,0,0,1,0,0}, {0,0,0,1,0,1,1,1,1,1,1,1,1,1,1,1,1,0}, { 0,0,0,1,0,0,0,0,0,0,1,0,0,0,0,0,0,0}, {1,1,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0}, { 0,1,1,1,0,0,0,0,0,0,1,0,0,1,0,0,0,0}, {0,0,1,1,0,0,0,1,1,1,1,1,1,1,1,0,0,0}, { 0,0,0,1,0,0,0,0,0,0,1,0,0,0,0,0,0,0}, {0,0,0,1,0,0,1,0,0,0,1,0,0,0,0,0,0,0}, { 0,0,0,0,0,1,1,0,0,0,1,0,0,0,0,1,1,0}, {0,0,0,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1}, {0,0,0,1,1,0,0,0,0,0,1,0,0,0,0,0,0,0}, {1,1,1,1,0,0,0,0,0,0,1,0,0,0,0,0,0,0}, { 0,1,1,1,0,0,0,0,0,0,1,0,0,0,0,0,0,0}, {0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0}, { 
0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0}};
  int i,j;
       for (i=0;i<=17;i++) for (j=0;j<=17;j++) {if (yang[i][j]==1) Putpixel (J+x,i+y,blue);
 }/****************** Home View **********************/int bort () {int A;
 Setfillstyle (solid_fill,15);
 Bar (49,49,71,71);
 Setfillstyle (Solid_fill,blue);
 Bar (50,50,70,70);
 Size1=imagesize (49,49,71,71);
 far1= (void *) malloc (SIZE1);
 GetImage (49,49,71,71,FAR1); 
 Cleardevice ();
 Setfillstyle (solid_fill,12);
 Bar (49,49,71,71);
 Size2=imagesize (49,49,71,71);
 far2= (void *) malloc (SIZE2);
 GetImage (49,49,71,71,FAR2);
 Setfillstyle (solid_fill,12);
 Bar (49,49,71,71);
 Setfillstyle (Solid_fill,green);
 Bar (50,50,70,70);
 Size3=imagesize (49,49,71,71);
 far3= (void *) malloc (SIZE3);
 GetImage (49,49,71,71,FAR3);                    Cleardevice (); /* Take snake body node background node worm node end*/SetbKcolor (8);
 Setfillstyle (Solid_fill,green);
 Bar (21,23,600,450);              Tline (21,23,600,450,15,8);
 /*** start Game scene frame stereo effect *******/tline (23,25,598,448,15,8);
 Tline (45,45,379,379,8,15);
 Tline (43,43,381,381,8,15);
 Tline (390,43,580,430,8,15);
 Tline (392,45,578,428,8,15);
 Tline (412,65,462,85,15,8);
 Tline (410,63,464,87,15,8);
 Tline (410,92,555,390,15,8);
 Tline (412,94,553,388,15,8);
 Tline (431,397,540,420,15,8);
 Tline (429,395,542,422,15,8);
 Tline (46,386,377,428,8,15); 
 Tline (44,384,379,430,8,15);
 SetColor (8);
 Outtextxy (429,109, "press ENTER");     Outtextxy (429,129, "---to start");
 /* Keyboard Control instructions * * OUTTEXTXY (429,169, "press ESC");
 Outtextxy (429,189, "---to quiet");
 Outtextxy (469,249, "up");
 Outtextxy (429,289, "left");
 Outtextxy (465,329, "down");
 Outtextxy (509,289, "right");
 SetColor (15);
 Outtextxy (425,105, "press ENTER");
 Outtextxy (425,125, "---to start");
 Outtextxy (425,165, "press ESC");
 Outtextxy (425,185, "---to quiet");
 Outtextxy (465,245, "up");
 Outtextxy (425,285, "left"); OutTextxy (461,325, "down");       Outtextxy (505,285, "right");
 /*******end*************/SetColor (8);
 Outtextxy (411,52, "score");
 Outtextxy (514,52, "left");
 SetColor (15);
 Outtextxy (407,48, "score");

 Outtextxy (510,48, "left");       Size4=imagesize (409,62,465,88);
 The/**** fraction box is placed in memory ********/far4= (void *) malloc (SIZE4);
 GetImage (409,62,465,88,FAR4);      Putimage (500,62,far4,copy_put);
 /******* Output Life frame ***********/Setfillstyle (solid_fill,12);
 SetColor (RED);         Outtextxy (415,70, "0");          /*************** input score is zero **********/outtextxy (512,70, "20");
  /************* shows the number of bugs to eat *********/bar (46,46,378,378);
  Feiyang (475,400);
  Fei (450,400);
  Yang (500,400);
  Outtextxy (58,390, "mailto:jiangzhiliang002@tom.com");
  Outtextxy (58,410, "Snake Game");
 Outtextxy (200,410, "made by Yefeng");
  while (1) {if (Bioskey (1)) A=bioskey (0);
 if (a==enter) break;
 }/******************gameover () ******************/void Gameover () {char *p= "GAME over"; 
 int cha;
 SetColor (yellow); SettexTstyle (0,0,6);

  Outtextxy (100,200,P);
  while (1) {if (Bioskey (1)) Cha=bioskey (0);
  if (CHA==ESC) {flag=1;
  Break 
 }}/*********** shows the **********************/void Snakepaint () {struct Snake *p1 of the snake body;
 P1=head;
 Putimage (A-11,b-11,far2,copy_put);
 while (P1!=null) {putimage (p1->newx-11,p1->newy-11,far1,copy_put);
 p1=p1->next; }/****************end**********************//********************* Snake body Refresh change game key part *******************/void
 Snakechange () {struct Snake *p1,*p2,*p3,*p4,*p5; 
 int i,j;
 static int n=0;
 static int score;
 static int left=20;
 Char sscore[5];
 Char sleft[1];
 P2=p1=head;
  while (p1!=null) {p1=p1->next;
  if (p1->next==null) {a=p1->newx;           b=p1->newy;
  /************ records the coordinates of the last node ************/sx=a;
  Sy=b;
  } p1->newx=p2->centerx;
  p1->newy=p2->centery;
 P2=P1;
} P1=head;
 while (P1!=null) {p1->centerx=p1->newx;
 p1->centery=p1->newy;
p1=p1->next; /******** to determine the key direction *******/if (BioskeY (1)) {ch=bioskey (0); if (CH!=RIGHT&AMP;&AMP;CH!=LEFT&AMP;&AMP;CH!=UP&AMP;&AMP;CH!=DOWN&AMP;&AMP;CH!=ESC)/********chy for the previous direction *********
 /Ch=chy;
         Switch (CH) {case Left:if (control!=4) {head->newx=head->newx-22;
  head->centerx=head->newx;
  control=2; 
     if (head->newx<47) Gameover ();
          else {head->newx=head->newx+22;
   head->centerx=head->newx;
   control=4;
     if (head->newx>377) Gameover ();
  } chy=ch; 
  Break
          Case Down:if (control!=1) {head->newy=head->newy+22;
   head->centery=head->newy;
   control=3;
         if (head->newy>377) Gameover ();
    else {head->newy=head->newy-22;
           head->centery=head->newy;
    control=1;
          if (head->newy<47) Gameover ();
         } chy=ch; 
  Break
          Case Right:if (control!=2) {head->newx=head->newx+22; Head->centerx=head->newx;
   control=4;
         if (head->newx>377) Gameover ();
          else {head->newx=head->newx-22;
          head->centerx=head->newx;
   control=2;
  if (head->newx<47) Gameover ();
         } chy=ch;
  Break
        Case Up:if (control!=3) {head->newy=head->newy-22;
        head->centery=head->newy;
    control=1;
       if (head->newy<47) Gameover ();
        else {head->newy=head->newy+22;
        head->centery=head->newy;
 control=3;
        if (head->newy>377) Gameover ();
        } chy=ch; 
 

  Break
       Case esc:flag=1;
 Break
   }/* If to determine whether to eat snakes/if (flag!=1) {if (head->newx==scenterx&&head->newy==scentery) {p3=head;
 while (p3!=null) {p4=p3;
   p3=p3->next;
  } p3= (struct snake *) malloc (sizeof (struct snake));
  p4->next=p3;
  p3->centerx=a;
  p3->newx=a;
  p3->centery=b; P3->newy=b; 
  p3->next=null;
  a=500;
  b=500;  Putimage (409,62,far4,copy_put);  /********** Fractional Frame blocks **************/putimage (500,62,far4,copy_put);
  /********* The former bug box in the ********/score= (++n) *100;
  left--;
  Itoa (score,sscore,10);
  Itoa (left,sleft,10);
  SetColor (RED);
  Outtextxy (415,70,sscore);
  Outtextxy (512,70,sleft);
  Nextshow=1;             if (left==0)/************ judge whether the clearance **********/Donghua ();       /******* if pass, play the Customs animation *********************/} P5=head;
 /********************* judge whether suicide ***************************/p5=p5->next;
 p5=p5->next;
 p5=p5->next;      p5=p5->next; /**** the fifth node to determine whether suicide ************/while (p5!=null) {if (head->newx==p5->centerx&&head->newy==p5->
    CenterY) {Gameover ();
  Break
 else p5=p5->next; The/************snakechange () function ends the *******************//***************************** main function **********************
 /int main () {int i;       Init (); /********** Initialization Graphics System/welcome ();       /*********8 Welcome Interface **************/Bort ();      /********* Home View ***************/Snakede ();
  The/********** table initializes **********/while (1) {snakechange ();
  if (flag==1) break;
  Snakepaint ();
  Ran ();
  for (i=0;i<=grade;i++) delay (3000);
 Free (FAR1);
 Free (FAR2);
 Free (FAR3);
 Free (FAR4);
 Closegraph (); 
return 0; }