Array of structs in C

Question

I\'m trying to create an array of structs and also a pointer to that array. I don\'t know how large the array is going to be, so it should be dynamic. My struct would look s

Answer 1

The second option of a pointer is good.

If you want to allocate things dynamically, then try:

stats_t* theStatsPointer = (stats_t*) malloc( MAX * sizeof(stats_t) );

as Roland suggests.

Just don't forget to

free(theStatsPointer);

when you're done.

Answer 2

Use malloc():

http://en.wikipedia.org/wiki/Malloc

Answer 3

This is how it is usually done:

size_t n = <number of elements needed>
stats_t *ptr = malloc (n * sizeof (stats_t));

Then, to fill it in,

for (size_t j = 0;  j < n;  ++j)
{
   ptr [j] .hours = whatever
   ptr [j] .days = whatever
   ...
}

Answer 4

Based on your replies to other answers it looks like you need a dynamic data structure like a linked list. Take a look at the queue(3) set of facilities.

Answer 5

malloc is your friend here.

stats_t stats[] = (stats_t*)malloc(N * sizeof(stats_t));

stats sort of is a pointer to the array. Or you can use stats[3] syntax as if it were declared explicitly as an array.