Using qsort

C's standard library provides qsort in <stdlib.h>. It sorts any array given a comparison function, so you rarely need to write your own sort.

The prototype is:

• base pointer to the first element
• nmemb number of elements
• size bytes per element
• compar a comparison function pointer

void qsort(void *base, size_t nmemb, size_t size, int (*compar)(const void *, const void *));