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very bizzare file writing problem

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# 8  
Old 11-27-2008
I experienced declaring array size as dynamic.
But wondering what is the difference with dynamic memory allocation?
rather than heap and stack.
# 9  
Old 11-27-2008
FWIK the use of a variable length array is only possible in C99 and some other languages, not in C.
The elements of an array must be a constant value, since arrays are blocks of non-dynamic memory whose size must be determined before execution, array sizes are determined at the time of compilation.
For dynamic arrays, you would use malloc.

Regards
# 10  
Old 11-27-2008
Quote:
Originally Posted by manikantants
I experienced declaring array size as dynamic.
But wondering what is the difference with dynamic memory allocation?
rather than heap and stack.
Local variables are always stack. If it was variable size, it would simply be dynamically choosing the amount of stack used. Which, like has been said, does not work with all compilers and C standards, so is best avoided.

By the way: strlen(str) is one smaller than the array size needed to store str, since a NULL terminator is also needed, so you want strlen(str)+1.
# 11  
Old 11-27-2008
Quote:
Originally Posted by fpmurphy
The line char sta[(int)strlen(data) is problematic. When you call strcpy(sta,data) you overflow sta because of the trailing "\0" that strcpy() appends.
Thanks fpmurphy. That helped solve my problems
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