{

int i,j,k,l,m,b[14000],n,s,f,d,aa,ab,ac,ad,ae,af,g,x,c[80][23];

char ch;

textcolor(0);

textbackground(7);

clrscr();

i=5;j=5;m=1;

for(i=4;i<76;i++)

{for(j=3;j<23;j++)

{c[i][j]=0;}}

clrscr();

gotoxy(35,15);

printf("welcome to snake mania");

getch();

clrscr();

gotoxy(35,14);

printf("instruction");

gotoxy(35,15);

printf("press w - up");

gotoxy(42,16);

printf("s-down");

gotoxy(42,17);

printf("a-left");

gotoxy(42,18);

printf("d-right");

gotoxy(42,19);printf("q-qiut");

start:

clrscr();

gotoxy(35,14);

printf("choose number to select level");

gotoxy(38,16);

printf("1)easy");

gotoxy(38,17);

printf("2)medium");

gotoxy(38,18);

printf("3)hard");

gotoxy(39,19);

printf("4)professional");

ch=getch();

if(ch=='1')

{s=400;}

else if(ch=='2')

{s=300;}

else if(ch=='3')

{s=100;}

else if(ch=='4')

{s=75;}

else{goto start;}

clrscr();

for(i=4;i<76;i++)

{gotoxy(i,3);printf("-");gotoxy(i,23);printf("-");}

for(j=3;j<=23;j++)

{gotoxy(3,j);printf("|");gotoxy(76,j);printf("|");}

gotoxy(5,1);printf("score=0 ");

gotoxy(50,24);printf("devolped by earnest");

x=0;

i=10;j=10;m=1;

for(n=0;n<5;n++)

{i=i+1;gotoxy(i,j);c[i][j]=1;b[m]=(i*100)+j;printf("*");m=m+1;}

n=5;

f=0;

goto food1;

game:

left:

f=1;

while(!kbhit())

{i=i+1;if(i>75||j>22||j<4||i<4){goto gameover;}

if(c[i][j]==1){goto gameover;}

if(i==aa&&j==ab){goto increase;}

gotoxy(i,j);c[i][j]=1;b[m]=(i*100)+j;printf("*");d=b[m-n];k=d/100;l=d%100;

gotoxy(k,l);printf(" ");c[k][l]=0;delay(s);m=m+1;}

ch=getch();

if(ch=='a')

{goto left;}

goto choice;

right:

f=2;

while(!kbhit())

{i=i-1;if(i>75||j<4||i<4||j>22){goto gameover;}

if (c[i][j]==1){goto gameover;}

if(i==aa&&j==ab){goto increase;}

gotoxy(i,j);c[i][j]=1;b[m]=(i*100)+j;printf("*");d=b[m-n];k=d/100;l=d%100;

gotoxy(k,l);printf(" ");c[k][l]=0;delay(s);m=m+1;}

ch=getch();

if(ch=='d')

{goto right;}

goto choice;

up:

f=3;

while(!kbhit())

{j=j-1;if(i<4||i>75||j>22||j<4){goto gameover;}

if(c[i][j]==1){goto gameover;}

if(i==aa&&j==ab){goto increase;}

gotoxy(i,j);c[i][j]=1;b[m]=(i*100)+j;printf("*");d=b[m-n];k=d/100;l=d%100;

gotoxy(k,l);printf(" ");c[k][l]=0;delay(s);m=m+1;}

ch=getch();

if(ch=='s'){goto up;}

goto choice;

down:

f=4;

while(!kbhit())

{j=j+1;if(i<4||i>75||j>22||j<4){goto gameover;}

if(c[i][j]==1){goto gameover;}

if(i==aa&&j==ab){goto increase;}

gotoxy(i,j);c[i][j]=1;b[m]=(i*100)+j;printf("*");d=b[m-n];k=d/100;l=d%100;

gotoxy(k,l);printf(" ");c[k][l]=0;delay(s);m=m+1;}

ch=getch();

if(ch=='w'){goto down;}

choice:

if(ch=='w'){goto up;}

else if(ch=='s'){goto down;}

else if(ch=='a'){goto right;}

else if(ch=='d'){goto left;}

else if(ch=='q'){goto exit;}

else {if(f==1){goto left;}

else if(f==2){goto right;}

else if(f==3){goto up;}

else{goto down;}}

food1:

randomize();

aa=(rand()%100);

if(aa<=3){goto food1;}

if(aa>=76){goto food1;}

randomize();

ab=(rand()%30);

if(ab<=3){goto food1;}

else if(ab>=23){goto food1;}

gotoxy(aa,ab);printf("*");

if(f==0){goto game;}

if(f==1){goto left;}

if(f==2){goto right;}

if(f==3){goto up;}

else{goto down;}

increase:

if(f==1){b[m]=(i*100)+j;gotoxy(i,j);printf("*");m=m+1;n=n+1;gotoxy(5,1);x=x+1;printf("score=%d",x);goto food1;}

if(f==2){b[m]=(i*100)+j;gotoxy(i,j);printf("*");m=m+1;n=n+1;x=x+1;gotoxy(5,1);printf("score=%d",x);goto food1;}

if(f==3){b[m]=(i*100)+j;gotoxy(i,j);printf("*");m=m+1;n=n+1;x=x+1;gotoxy(5,1);printf("score=%d",x);goto food1;}

else{b[m]=(i*100)+j;gotoxy(i,j);printf("*");m=m+1;n=n+1;x=x+1;gotoxy(5,1);printf("score=%d",x);goto food1;}

gameover:

clrscr();

gotoxy(35,10);

printf("game over");

gotoxy(30,11);

printf("your score=%d",x);

gotoxy(30,12);

printf("press key to continue");

getch();

goto exit;

exit:

clrscr();

gotoxy(32,11);

printf("do you want to quit(y/n)");

ch=getch();

if(ch=='n')

{goto start;}

else if(ch=='y')

{clrscr();gotoxy(35,11);printf("thanks for playing");getch();goto qiut;}

else{goto exit;}

qiut:

getch();

return 0;