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Description:
  game.c
Language: C/C++
Code:
     #include<dos.h>
#include<conio.h>
#include<graphics.h>
#include<stdio.h>
#include<stdlib.h>

#define UP 72
#define LEFT 75
#define RIGHT 77
#define DOWN 80
#define ESC 1
#ifdef __cplusplus
      #define __CPPARGS ...
#else
      #define __CPPARGS
#endif
struct SnakeParts{
           int x;
           int y;
}box[50],target;
void snake(int ,int );
void initialize(int,int);
void interrupt (*prev)(__CPPARGS);
void interrupt our(__CPPARGS);
void snakeb();
int check();
void Rectangle(int ,int,int,int);
int
stop=0,blocks=4,direction=2,size=10,hit=1,snake_color=14,bk=7,target_color
=4;
int stage=1,speed=100,point=0;
void main(){
           int gd=DETECT,gm,x=100,y=100,i=0,j=0;
           char msg[50];
           initgraph(&gd,&gm,"");
           /*animation*/
           prev=getvect(9);
   /*           setcolor(bk);
           rectangle(0,0,639,479);
           setfillstyle(SOLID_FILL,bk);
           floodfill(250,250,bk);*/
           initialize(x,y);
           //getch();
           while (1){
                      /*setcolor(bk);
                      sprintf(msg,"POINT = %3d",point);
                      settextstyle(0,HORIZ_DIR,1);
                      outtextxy(550,100,msg); */
                      switch(direction){
                                 case 0: j-=size;break;
                                 case 1: j+=size;break;
                                 case 2: i+=size;break;
                                 case 3: i-=size;break;
                      }
                      setcolor(snake_color);
                      snake(x+i,y+j);//,x+15+i,y+15+j);
                      delay(speed);
                      setcolor(bk);
                      snakeb(/*x+i,y+j*/);//,x+15+i,y+15+j);
                      setvect(9,our);
                      if(stop==1){break;}
                      if(check()){break;}
                      if(hit==1){
                                 hit=0;
                                 target.x=size+size*random(25);
                                 target.y=size+size*random(20);
                                 setcolor(target_color);
                                 setfillstyle(SOLID_FILL,target_color);
                                 circle(target.x+size/2,target.y+size/2,size/2-1);
                                 floodfill(target.x+size/2,target.y+size/2,target_color);
                      }
                      setfillstyle(SOLID_FILL,target_color);
                      setcolor(2);
                      circle(target.x+size/2,target.y+size/2,size/2-1);
                      floodfill(target.x+size/2,target.y+size/2,2);
                      /*setcolor(11);
                      sprintf(msg,"POINT = %3d",point);
                      settextstyle(0,HORIZ_DIR,1);
                      outtextxy(550,100,msg);*/
                      gotoxy(65,4);
                      printf("POINT = %3d",point);
                      //delay(3000);
                      //cleardevice();
           }
           closegraph();
}
void interrupt our(__CPPARGS){
           //if(inportb(0x60)==UP){
                      //i=0;j
            switch(inportb(0x60)){
                      case UP: if(direction==1)break;direction=0;break;
                      case DOWN: if(direction==0)break;direction=1;break;
                      case RIGHT: if(direction==3)break;direction=2;break;
                      case LEFT: if(direction==2)break;direction=3;break;
                      case 15:blocks++;break;
                      case ESC:  stop=1;break;
            }

            (*prev)();
}
void snake(int x1,int y1){//,int x2,int y2){
           int k=0;
           //if(getcolor()==15){
                      for(k=blocks-1;k>0;k--){
                                 box[k].x=box[k-1].x;
                                 box[k].y=box[k-1].y;
                      }
                      box[0].x=x1;
                      box[0].y=y1;
           //}
           //setfillstyle(SOLID_FILL,snake_color);
           for(k=0;k<blocks;k++){
                      Rectangle(box[k].x,box[k].y,box[k].x+size,box[k].y+size);
                      //floodfill(box[k].x+size/2,box[k].y+size/2,snake_color);
           }

}
void snakeb(){
           //setfillstyle(SOLID_FILL,bk);
           for(int k=0;k<blocks;k++){
                      Rectangle(box[k].x,box[k].y,box[k].x+size,box[k].y+size);
                      //floodfill(box[k].x+size/2,box[k].y+size/2,bk);
           }
}
void initialize(int x,int y){
           setcolor(bk);
           rectangle(0,0,639,479);
           setfillstyle(SOLID_FILL,bk);
           floodfill(250,250,bk);
           box[0].x=x;
           box[0].y=y;
           for(int i=1;i<blocks;i++){
                      box[i].x=x-size*i;
                      box[i].y=y;
           }
           /*for(int k=0;k<blocks;k++)
                      rectangle(box[k].x,box[k].y,box[k].x+15,box[k].y+15);*/
}
int check(){
           int i;
           char msg[50];

           if(!(box[0].x>=0 && box[0].x<=639 && box[0].y>=0 && box[0].y<=479)){
                      for( i=100;i<700;i+=100){
                      sound(i);
                      delay(100);
                      nosound();
                      }
                      sprintf(msg,"GAME OVER");
                      setcolor(4);
                      settextstyle(1,HORIZ_DIR,6);
                      outtextxy(150,200,msg);
                      delay(3000);
                      cleardevice();
                      return 1;
           }
           for( i=1;i<blocks;i++){
                      if(box[0].x==box[i].x && box[0].y==box[i].y){
                                 sprintf(msg,"GAME OVER");
                                 setcolor(4);
                                 settextstyle(1,HORIZ_DIR,6);
                                 outtextxy(150,200,msg);
                                 delay(3000);
                                 cleardevice();
                                 return 1;
                      }
           }
           if(box[0].x==target.x && box[0].y==target.y){
                      //for( i=50;i<400;i+=50){
                      sound(700);
                      delay(100);
                      nosound();
                      //}
                      blocks++;
                      point++;
                      hit=1;
                      setcolor(bk);
                      //circle(target.x+size/2,target.y+size/2,size/2-1);
                      setfillstyle(SOLID_FILL,bk);
                      setcolor(bk);
                      circle(target.x+size/2,target.y+size/2,size/2-1);
                      floodfill(target.x+size/2,target.y+size/2,bk);
           }
           if(blocks==40){
                      stage++;
                      blocks=4;
                      sprintf(msg,"STAGE %d CLEARED",stage-1);
                      setcolor(4);
                      settextstyle(1,HORIZ_DIR,6);
                      outtextxy(150,200,msg);
                      delay(2000);
                      cleardevice();
                      initialize(100,100);
                      speed=100/stage;
           }
           return 0;
}
void Rectangle(int x1,int y1,int x2,int y2){
           for(int i=0;i<size/2;i++)
                      rectangle(x1+i,y1+i,x2-i,y2-i);
}
     
          
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