I'm reading a binary file with fread, and I'm getting some strange results. This is from the man page: size_t fread(void *ptr, size_t size, size_t nmemb, FILE *stream); The function fread() reads nmemb elements of data, each size bytes long, from the stream pointed to by stream, storing them at the location given by ptr. I understand it to read (nmemb * size) bytes from the file and I'm trying to use it like this: fread(record_array, num_records, sizeof(record), myfile) and I'm expecting to read (num_records * sizeof(record)) bytes, call it 10 * 50 = 500. However, when I do this, it only reads sizeof(record) (50) bytes. If I call it like this it works fine (many elements of size 1 byte each): fread(record_array, 1, (num_records * sizeof(record)), myfile) so it seems to ignore the 2nd function parameter. Weird? It's not killing me, but I'm not sure why the size_t size variable is redundant?