Snake game challenge in UNIX Post: 302996301

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The Lounge What is on Your Mind? Snake game challenge in UNIX Post 302996301 by wisecracker on Monday 24th of April 2017 04:16:21 AM

04-24-2017

Registered User

Hi amit14august...
You must be using a bash version 4.x.x as it cannot be used on anything previous.
On OSX 10.12.4, DEFAULT bash terminal below occurs...

Code:

Last login: Sun Apr 23 09:13:49 on ttys000
AMIGA:amiga~> bash --version
GNU bash, version 3.2.57(1)-release (x86_64-apple-darwin16)
Copyright (C) 2007 Free Software Foundation, Inc.
AMIGA:amiga~> cd Desktop/Code/Shell
AMIGA:amiga~/Desktop/Code/Shell> ./snakegame.sh






Your green snake must stay away from pink ones

control : I = UP  J = LEFT  K = DOWN  L = RIGHT

 Game will start in 3 seconds


your score is : 1      top score is 1000
./snakegame.sh: line 283: declare: -A: invalid option
declare: usage: declare [-afFirtx] [-p] [name[=value] ...]
                                             
                                             
                                             
                                             
                                             
                                             
@@@@@                                        
                                             
                                             
                        ***                  
                                             
                                             
                                             
                                             
                                             
./snakegame.sh: line 221: init_snake: bad array subscript
./snakegame.sh: line 222: init_snake: bad array subscript
./snakegame.sh: line 167: read: .025: invalid timeout specification
./snakegame.sh: line 88: [: -eq: unary operator expected
./snakegame.sh: line 95: init_helper_one: bad array subscript
./snakegame.sh: line 96: init_helper_one: bad array subscript
./snakegame.sh: line 100: 1 -  : syntax error: operand expected (error token is " ")
AMIGA:amiga~/Desktop/Code/Shell> _

So it is not backwards compatible.
To find your bash version:-

Code:

Last login: Mon Apr 24 07:15:34 on console
AMIGA:amiga~> bash --version
GNU bash, version 3.2.57(1)-release (x86_64-apple-darwin16)
Copyright (C) 2007 Free Software Foundation, Inc.
AMIGA:amiga~> _

It is not easy to include users who do not have versions of languages that you write for and possibly unable to upgrade to. So be aware when you write your code to state which version of language you are using as that helps the user to decide whether or not to run your code.
We all learn the hard way.
Good luck and keep up with the programming learning curve.
We look forwards to seeing more from you...

Bazza.

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LEARN ABOUT DEBIAN

rbash

RBASH(1)						      General Commands Manual							  RBASH(1)

NAME

       rbash - restricted bash, see bash(1)

RESTRICTED SHELL

       If  bash  is  started with the name rbash, or the -r option is supplied at invocation, the shell becomes restricted.  A restricted shell is
       used to set up an environment more controlled than the standard shell.  It behaves identically to bash with the exception that the  follow-
       ing are disallowed or not performed:

       o      changing directories with cd

       o      setting or unsetting the values of SHELL, PATH, ENV, or BASH_ENV

       o      specifying command names containing /

       o      specifying a file name containing a / as an argument to the .  builtin command

       o      specifying a filename containing a slash as an argument to the -p option to the hash builtin command

       o      importing function definitions from the shell environment at startup

       o      parsing the value of SHELLOPTS from the shell environment at startup

       o      redirecting output using the >, >|, <>, >&, &>, and >> redirection operators

       o      using the exec builtin command to replace the shell with another command

       o      adding or deleting builtin commands with the -f and -d options to the enable builtin command

       o      using the enable builtin command to enable disabled shell builtins

       o      specifying the -p option to the command builtin command

       o      turning off restricted mode with set +r or set +o restricted.

       These restrictions are enforced after any startup files are read.

       When a command that is found to be a shell script is executed, rbash turns off any restrictions in the shell spawned to execute the script.

SEE ALSO

       bash(1)

GNU Bash-4.0							    2004 Apr 20 							  RBASH(1)