GCC compile, run but show "segment error" Workaround

For the first time on the Liunx (Liunx Mint 17) using GCC to compile C files, unexpectedly prompted "Can't find Stdio.h", after Google found that execution

sudo Install build-essential

Can, see: http://slipper-99933.blog.163.com/blog/static/39954044201021651833785/

Body:

? Just learned the flexible array, according to the tutorial wrote a flexible array to generate the Fibonacci sequence, after a change after the GCC compiler passed, the runtime is prompted "segment error." Google says it is most likely a memory access error caused by the array Nearúdtoúd interface. A careful examination is due to access to an unassigned pointer.
? To avoid such problems after all the definition of pointers are initialized first, but also strict attention to the pointer before the value of access.
?
? Before modification:

typedefstruct_soft_array{intLen; intarray[];} Softarray;softarray* Create_soft_array (intsize) {Softarray*ret; RET->len =size; if(Size >0 )    {       returnret = (softarray*) malloc (sizeof(*ret) +sizeof(int)*size); }    returnRET =NULL;}

? After modification:

 typedef struct   _soft_array{ int   Len;  int   array[];} Softarray;softarray  * Create_soft_array (int   size)    {softarray  * ret = NULL;  if  (Size > 0   = (softarray*) malloc (sizeof  (*ret) + sizeof  (int ) *size);    RET ->len = size;  return   ret;}  

date:2014-10-25

GCC compile, run but show "segment error" Workaround