i get 20 in both outputs, y has the array not grown ?
Code:#include <stdio.h> #include <stdlib.h> int main( void ) { int bytes[5]; int * pBytes = bytes; printf("%d",sizeof(bytes)); pBytes = (int*)realloc( pBytes, 2 * sizeof( bytes ) ); // grow it 2x printf("%d",sizeof(bytes)); getchar(); return 0; }
What you did is allocate memory for pBytes. I don't know if this is ever guaranteed to work, as you used realloc() and pBytes had no memory allocated for it. I don't think you can change the size of a statically-allocated variable.
> pBytes = (int*)realloc( pBytes
You can't resize an array.
The only thing you can pass to realloc is the result of a previous malloc / calloc / realloc call.
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
thanx!
so statically allocated arrays cannot be resized!
