Snake game using C++ won't display tail properly

<pre>#include<iostream>
#include<stdlib.h>
#include<windows.h>
#include<conio.h>
using namespace std;

bool gameover;
const int width=20;
const int height=20;
int fruitX, fruitY;
enum directions{STOP=0, LEFT, RIGHT, UP, DOWN};
enum directions dir;
int score;



struct body
{
int x;
int y;
body* next;
body* prev;
}*head=NULL;

body* t;
body* tail;
body* q=head;


void create()
{
gameover=false;

dir=STOP;

head=(body*)malloc(sizeof(body));
head->prev=NULL;
head->next=NULL;
head->x=(width/2)-1;
head->y=(height/2)-1;


fruitX=rand()%width;
fruitY=rand()%height;

score=0;
}

void display()
{
system("cls");

for(int i=0;i<width;i++)
    cout<<"x";
cout<<endl;

for(int j=0;j<height;j++)
{
    for(int i=0;i<width;i++)
    {
        if(i == 0 || i == width-1)
           cout<<"x";
        else if(i == head->x && j == head->y)
           cout<<char(254);
        else if(i == fruitX && j == fruitY)
           cout<<"*";
        else
        {
            bool printTail=false;

            while(q != head)
            {
                q=q->next;
            }
            if(i == q->x && j == q->y)
            {
                cout<<char(254);
                printTail=true;
            }
        if(!printTail)     
           cout<<" ";   
        }   
    }
    cout<<endl;
}
for(int i=0;i<width;i++)
    cout<<"x";
cout<<endl;
cout<<"Score:"<<score;
}

void logic()
{
switch(dir)
{
    case UP:head->y--;break;
    case DOWN:head->y++;break;
    case LEFT:head->x--;break;
    case RIGHT:head->x++;break;
}
if(fruitX == head->x && fruitY == head->y)
{
    fruitX=rand()%width;
    fruitY=rand()%height;
    score++;



    body* tail=(body*)malloc(sizeof(body));
    t=head;
    t->next=tail;
    tail->prev=t;
    t=tail;

    if(dir==RIGHT)
    {
        t->x=t->prev->x++;
        t->y=t->prev->y;
    }
    else if(dir==LEFT)
    {
        t->x=t->prev->x--;
        t->y=t->prev->y;
    }
    else if(dir==UP)
    {
        t->x=t->prev->x;
        t->y=t->prev->y++;
    }
    else if(dir==DOWN)
    {
        t->x=t->prev->x;
        t->y=t->prev->y--;
    }
}

if(head->x > width-1)
  head->x=0;
else if(head->x < 0)
  head->x=width-1;
else if(head->y > height)
  head->y=0;
else if(head->y < 0)
  head->y=height-1;


}

void input()
{
if(kbhit())
{
    switch(getch())
    {
        case 'w':dir=UP;break;
        case 's':dir=DOWN;break;
        case 'd':dir=RIGHT;break;
        case 'a':dir=LEFT;break;
        case 'p':gameover=true;break;
    }
}

}

int main()
{
create();

while(!gameover)
{
    display();
    input();
    logic();
    Sleep(100);
}
}