Zilog EZ80F916 - Manual (Page 377)

UM014423-0607 C Standard Library
ZiLOG Developer Studio II
eZ80Acclaim! ® User Manual
357
The array is sorted in ascending order according to a comparison function pointed to by
compar , which is called with two arguments that point to the objects being compared. The
compar function returns an integer less than, equal to, or greater than zero if the first argu-
ment is considered to be respectively less than, equal to, or greater than the second.
If two members in the array compare as equal, their order in the sorted array is unspeci-
fied.
Synopsis
#include
void qsort(void *base, size_t nmemb, size_t size, int (*compar)(void *, void *));
Example
int lst[]={5,8,2,9};
int compare (void * x, void * y);
qsort (lst, sizeof(int), 4, compare);
int compare (void * x, void * y)
{
int a = *(int *) x;
int b = *(int *) y;
if (a < b) return -1;
if (a == b)return 0;
return 1;
}
rand
Computes a sequence of pseudorandom integers in the range 0 to RAND_MAX.
Synopsis
#include
int rand(void);
Returns
A pseudorandom integer.
Example
int i;
srand(1001);
i=rand();