> net=(struct s_net *) realloc(net, new_dimension  * sizeof(struct
> s_net));
> block=(struct s_block *) realloc(block, new_dimension * sizeof(struct
> s_block));

> s_net is defined as:
> struct s_net {char *name; int num_pins; int *blocks; int *blk_pin; };

> s_block is defined as:
> struct s_block {char *name; enum e_block_types type; int *nets; int x;
> int y; boolean combinatorial;};

> after the realloc the element number 324 of the two arrays is lost.

> can somebody explain what happens?

> thanks

> Submitted by "Giancarlo" to comp.lang.c:
> > look at this code:

> > net=(struct s_net *) realloc(net, new_dimension  * sizeof(struct
> > s_net));
> > block=(struct s_block *) realloc(block, new_dimension * sizeof(struct
> > s_block));

> Proper call to realloc:

> newptr = realloc(oldptr, newsize);
> if (newptr != NULL)
>     oldptr = newptr;
> else
>     /* handle alloc error */

> No cast is neccesary.