problem compiling ...

[182blink]

Hey everyone,

I'm applying for a job .. I submitted a puzzle that works very well, but got an email back saying that they couldn't compile it. i am using mingw / msys to compile and run my program, and it works fine on my computer.

is there another compiler that i could use to find these "errors" that they are getting on their end??

“The code I recieved is segfaulting here:
fflush(stdout);
---> greenHouse[numOfHouses]=lowest;
numOfHouses++;
}//while

alternately, if anyone could take a look at my program and tell me if they also get errors, i'd really appreciate any help on this matter, as it's kinda frustrating me that i have a solution that works but can't submit it.

thanks everyone,

-Sean

[itsme86]

If they're saying that it's segfaulting then it's not actually a compile problem at all. Segfaults are runtime errors.

Are you sure you're not just overrunning your greenHouse array bounds? That can lead to a "it works fine most of the time, but not always" problem.

[182blink]

i don't know ... my program is static, there is no user input, so it should be the same every time. basically it reads in a file and outputs some text based on that file. even if the file changes, the variable numOfHouses should be fine ... unless they are doing really screwed up test cases. hmmm maybe i'll ask them about that.

Just to confirm ... do segfaults give any information as to the type of error?? or just basically "runtime errors"? and what is a good debugging program for programming in c?

Thanks,

-Sean

[itsme86]

do segfaults give any information as to the type of error

segfaults are a specific type of error. It occurs when the program tries to access memory it doesn't have permission to, or tries to write to memory that is read-only.

i don't know

Well if you don't know then I would say that's a design flaw in your program. As a programmer, you should make sure you're not trampling over parts of memory that you shouldn't.

[linuxdude]

It may be static in that there is no user input but is it the same file on there computers as the one you've been testing you're code on?

[Salem]

> greenHouse
Well if you did something like
int *greenHouse;

without bothering to allocate it, then sure it might work for you and give problems for someone else.

Or maybe you forgot to account for the size when you allocated
greenHouse = malloc ( 10 );
is NOT space for 10 integers. Again, you might run off the end happily, but someone else might not.

Or you could have done it right, and still incremented numOfHouses past whatever limit you asked for.

Anything else, post your code.