Re: Structures and malloc at runtime

bigpig@[EMAIL PROTECTED]
 wrote:
> 
> Please could someone look at the following code and see if with
> some modifications it is possible to make it work:
> I just want to allocate some memory at runtime for 500
> structures (in this example) and use it as in the example
> 
> struct data {
>   char name[10];
>   long age;
> } ENTRY;

This declares a data item of type struct data named ENTRY.  Please
don't use upper case for data names, reserve the upper case for
macros.
> 
> struct ENTRY * list1 = (struct ENTRY *)malloc(500 * sizeof(ENTRY));

This should create a compiler error.  Replace "ENTRY" with "data". 
Also eliminate the cast.  You are obviously using C, not C++, and
the cast can only hide errors.  Have you #included <stdlib.h> ?
> 
> strcpy(list1[1].name, "Hello");    (1)
> list1[1].age = 5;
> 
> (1) will give the following errors:
> unknown size for type 'incomplete struct ENTRY defined at....
> unknown field 'name' of 'incomplete struct ENTRY defined at...
> type error in argument 1 to 'strcpy'; found 'int' expected
> 'pointer to char'

Now I expect the above code will work.

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