Not a direct solution, but an advice on how to proceed to understand what your code really do.
Quote:I tried to remove the the code to display the tail it worked just fine, added it back again and the same thing happens, so apparently the problem is with the display tail line but I cant figure out why.
Your code do not behave the way you expect, or you don't understand why !
There is an almost universal solution: Run your code on debugger step by step, inspect variables.
The debugger is here to show you what your code is doing and your task is to compare with what it should do.
There is no magic in the debugger, it don't know what your code is supposed to do, it don't find bugs, it just help you to by showing you what is going on. When the code don't do what is expected, you are close to a bug.
To see what your code is doing: Just set a breakpoint and see your code performing, the debugger allow you to execute lines 1 by 1 and to inspect variables as it execute.
Debugger - Wikipedia, the free encyclopedia
Mastering Debugging in Visual Studio 2010 - A Beginner's Guide
Basic Debugging with Visual Studio 2010 - YouTube
1.11 — Debugging your program (stepping and breakpoints) | Learn C++
The debugger is here to only show you what your code is doing and your task is to compare with what it should do.
Your program look like a simplified version of SnakeByte (40 years old).
Advices and improvements on this game:
- Rather that using the TTY standard output, you should use an output that allow you to move cursor as you need, it allow you to update only changed parts instead of regenerating the whole screen every time.
- Problem: when generating a new fruit, you forgot to check if new fruit is on body of snake.
- Problem: as the snake moves, you forgot to check if head crosses the body.
- Advice: Rather than using a double linked list to store the snake, I would make the 2D map of play field stored as a 2D array. It simplify programming the game.
Snake Byte - Wikipedia
search Google or YouTube with "snakebyte game apple" for more.