初学者求如下贪吃蛇代码的注释
程序代码：while(flag==1)
{
if(t>5)
break;
flag=0;
pt=head;
while(pt!=NULL)
{
if(food.x==pt->x && food.y==pt->y)
{
flag=1;
food.x=rand()%15;
food.y=rand()%15;
break;
}
pt=pt->next;
}
t++;
}
if(t>5)
{
if(c=='d')
{
food.x=head->x+1;
food.y=head->y;
if(food.x>=15)
food.x-=15;
}
else if(c=='a')
{
food.x=head->x-1;
food.y=head->y;
if(food.x<0)
food.x+=15;
}
else if(c=='w')
{
food.x=head->x;
food.y=head->y+1;
if(food.y>=15)
food.y-=15;
}
else if(c=='s')
{
food.x=head->x;
food.y=head->y-1;
if(food.y<0)
food.y+=15;
}
}
}
if(kbhit())
{
c1=getch();
if(c1==27)
break;
if(c!='d' && c1=='a')
c=c1;
else if(c!='a' && c1=='d')
c=c1;
else if(c!='w' && c1=='s')
c=c1;
else if(c!='s' && c1=='w')
c=c1;
}
pt=rear;
while(pt!=head )
{
pt->x=pt->pre->x;
pt->y=pt->pre->y;
pt=pt->pre;
}
if(c=='d')
{
head->y+=1;
if(head->y>=15)
head->y-=15;
}
else if(c=='a')
{
head->y-=1;
if(head->y<0)
head->y+=15;
}
else if(c=='w')
{
head->x-=1;
if(head->x<0)
head->x+=15;
}
else if(c=='s')
{
head->x+=1;
if(head->x>=15)
head->x-=15;
}
pt=head->next;
while(pt!=NULL)
{
if(head->x==pt->x && head->y==pt->y)
{
gameover=1;
break;
}
pt=pt->next ;
}
if(gameover==1)
break;
system("cls");
printf(" ───────────────\n");
for(i=0;i<15;i++)
{
printf("│");
for(j=0;j<15;j++)
{
flag=0;
pt=head;
while(pt!=NULL)
{
if(i==pt->x && j==pt->y)
{
if(pt==head)
printf("■");
else
printf("□");
flag=1;
break;
}
pt=pt->next;
}
if(flag==0)
{
if(i==food.x && j==food.y)
{
putchar(food.c);
putchar(food.c);
continue;
}
printf(" ");
}
}
printf("│");
putchar('\n');
}
printf(" ───────────────\n");
_sleep(200);
}
if(gameover==1)
puts("game over!\n");
getch();
}
