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C++ Project on Snake Game

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Snake Game

#include 
#include 
#include 
#include 
#include 
#include 


#define ESC 27 
#define UPARR 72 
#define LEFTARR 75 
#define DOWNARR 80 
#define RIGHTARR 77 
#define SAVE 60 
#define LOAD 61 


main() 
{ 
void starting(void); 
void make_xy(char **,char **); 
void getrand(char *,char *,char *,char *,char *,int,char); 
char getkey(char,char); 
void savegame(char *,char *,int,char); 
int loadgame(char *,char *,char *); 
void win_message(void); 


char *x,*y,pos_x,pos_y,num,out=0,old_ch=0,ch=0,new_ch,new_x,new_y,old_num=0; 
int i,length=6; 


starting(); 
make_xy(&x,&y); 
getrand(&pos_x,&pos_y,&num,x,y,length,ch); 


while(!out){ 
if((new_ch=getkey(old_ch,ch))==ESC) 
out=2; 
if(out) 
break; 
if(new_ch==SAVE) 
savegame(x,y,length,old_ch); 
else if(new_ch==LOAD){ 
length=loadgame(x,y,&ch); 
getrand(&pos_x,&pos_y,&num,x,y,length,ch); 
} 
else 
ch=new_ch; 
new_x=x[0]; 
new_y=y[0]; 
if(ch==UPARR) 
new_y=y[0]-1; 
else if(ch==LEFTARR) 
new_x=x[0]-1; 
else if(ch==DOWNARR) 
new_y=y[0]+1; 
else if(ch==RIGHTARR) 
new_x=x[0]+1; 
old_ch=ch; 
if((new_x<2)|(new_y<2)|(new_x>79)|(new_y>22)) 
out=1; /* HIGHEST POSSIBLE SCORE ÷ (78*21-6)*5 = 8160 ÷ 10,000 */ 
for(i=1;i0;i--){ 
x[i]=x[i-1]; 
y[i]=y[i-1]; 
if(i==1){ 
gotoxy(x[i],y[i]); 
putchar('Û'); 
} 
} 
x[0]=new_x; 
y[0]=new_y; 
gotoxy(x[0],y[0]); 
printf("\b"); /* USE THE FUNCTION _setcursortype() */ 
if(out) 
break; 
delay(99); 
} 
if(out==1){ 
gotoxy(1,24); 
printf("The snake collided with the wall or with itself!\n" 
"GAME OVER!!\t\t(Press 'q' to terminate...)"); 
gotoxy(x[0],y[0]); 
while(toupper(getch())!='Q'); 
} 
clrscr(); 
printf("Hope you enjoyed the game\n\n\t\tBye!\n"); 
return 0; 
} 


/*-------------------------------------------------------------------------*/ 


void starting() 
{ 
char i; 


clrscr(); /* FIRST TO DRAW A BOUNDARY for THE GAME */ 
putchar('É'); 
for(i=0;i<78;i++) 
putchar('Í'); 
putchar('»'); 
gotoxy(1,23); 
putchar('È'); 
for(i=0;i<78;i++) 
putchar('Í'); 
putchar('¼'); 
window(1,2,1,23); 
for(i=0;i<21;i++) 
cprintf("º"); 
window(80,2,80,23); 
for(i=0;i<21;i++) 
cprintf("º"); /* THE BOUNDARY IS DRAWN */ 
window(1,1,80,25); 
gotoxy(38,12); 
printf("ÛÛÛÛÛ"); /* THE "SNAKE" IS PUT for THE FIRST TIME */ 
gotoxy(1,24); 
printf("Welcome to the game of SNAKE!\n(Press any arrow key to start now," 
" Escape to leave at any time...)"); /* WELCOME MESSAGE */ 
gotoxy(43,12); 
while(!kbhit()); 
gotoxy(30,24); 
delline();delline(); /* REMOVING MESSAGE */ 
cprintf("\n( EAT THE NUMBER !! ) Score = 0"); 
gotoxy(43,12); /* GO TO THE HEAD OF THE SNAKE */ 
} 


void make_xy(char **px,char **py) 
{ 
char i; 


*px=(char *)malloc(1638*sizeof(char)); /*EARLIER IT WAS 6, NOT 1638; BUT*/ 
*py=(char *)malloc(1638*sizeof(char)); /*realloc IS NOT COPYING PROPERLY*/ 
for(i=0;i<6;i++){ 
(*px)[i]=43-i; 
(*py)[i]=12; 
} /* THE TWO ARRAYS for COORDINATES OF THE SNAKE ARE SIMULATED */ 
} 


void getrand(char *px,char *py,char *pn,char *x,char *y,int length,char ch) 
{ 
int allowed=0,i; /* i AND length MUST BE int */ 


while(!allowed){ 
allowed=1; 
srand((unsigned)time(0)); 
*px=rand()%78+2; /* GENERATING RANDOM POSITIONAL COORDINATES for */ 
srand((unsigned)time(0)); 
*py=rand()%21+2; /* PUTTING A RANDOM NUMBER */ 
if(ch==UPARR){ 
if((*px==x[0])&(*py==y[0]-1)) 
allowed=0; 
} 
else if(ch==DOWNARR){ 
if((*px==x[0])&(*py==y[0]+1)) 
allowed=0; 
} 
else if(ch==LEFTARR){ 
if((*px==x[0]-1)&(*py==y[0])) 
allowed=0; 
} 
else if((ch==RIGHTARR)&(*px==x[0]+1)&(*py==y[0])) 
allowed=0; 
for(i=0;(i


			
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