• C

Creating a C Static Char Array

Hello,

I'm trying to create a static array in C for some JNI testing.  My goal is to have the charArray function return a pointer to a char array and then in my JNI code, I'll retrieve those results.  Whenever I have more than one character in the C char array, my JNI code is only able to get the last character from the array element (i.e. 'C', 'E' and '6' get returned for "doesn't work example below).

I feel I have a bug in the way I'm creating the array on the C side, does anyone have any ideas of where I've gone wrong?  

Works:
inline char *charArray(){
	static char foo[3];
	foo[0]='A';
    foo[1]='5';
    foo[2]='E';
    return foo;
}

Open in new window


Doesn't Work:
inline char *charArray(){
	static char foo[3];
	foo[0]='ABC';
    foo[1]='5CDE';
    foo[2]='EEE6';
    return foo;
}

Open in new window

cgray1223Asked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

jkrCommented:
I think you are mixing up a character or chars and a character of strings. If your final goal would be to concatenate strings to one longer string, you should use

inline char *charArray(){
	static char foo[64] = "\0";
	strcat(foo,"ABC");
	strcat(foo,"5CDE");
	strcat(foo,"EEE6");

    return foo;
}                     

Open in new window


The above would return "ABC5CDEEEE6".
0
cgray1223Author Commented:
thanks for the response, jkr.  The goal would be to treat them as separate elements on the Java side and not string the together.
0
jkrCommented:
Hmmm, then you are probably thinking of an array of strings, i.e.

inline char *stringArray(){
	static char* foo[3];
	foo[0]="ABC";
    foo[1]="5CDE";
    foo[2]="EEE6";
    return foo;
}
                                  
}
                                  

Open in new window

0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
C

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.