Initialization to zero suddenly changes value

[simmol]

Hi,

I'm running a simulation over time and I'm having trouble with arrays in my C program. An array element that has been initialized to zero suddenly changes value to 13 after a few time points, and surprisingly, this only happens in some runs. If I print out values from different parts of the program, I can clearly see the value changing.

I am not using dynamic memory allocation, so I'm not sure why I see this strange behavior. Has anybody seen such behavior before and do you have any idea what could be causing the problem?

I am stuck at this point and I'm not sure how to proceed. Any suggestions/advice will be greatly appreciated.

[JosAH]

Without seeing any code I guess/suspect that some char[] is overwritten and causes a worm (too many chars are written to that array); but I could very well be wrong though.

kind regards,

Jos

[simmol]

The code is very long..I could e-mail it to you.

Thanks!

[r035198x]

You could try posting the parts of the code that you suspect.

[JosAH]

Look at the variables that are defined just before that mysteriously changing variable in the same scope; especially suspect the char[] variables; check the code that manipulates those variables. The error is most likely somewhere in that code.

kind regards,

Jos

[weaknessforcats]

Almost certainly you have a pointer error and I suspect your array handling code is scatttered throughout the program. The first thing I would do is write a series of functions to manage that array and call those functions as needed elsewhere in the program.