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| double_cmp(3) | FreeBSD Library Functions Manual | double_cmp(3) |
LIBRARY
#include <xtend/math.h> -lxtend
SYNOPSIS
int double_cmp(const double *n1, const double *n2)
ARGUMENTS
n1, n2 Pointers to two double values
DESCRIPTION
This is a function that compares two doubles as a service to polymorphic functions such as qsort(3), bsearch(3), etc. The address of double_cmp() is passed as an argument to perform the data type specific comparison on behalf of the sort of search function.RETURN VALUES
A value > 0 if *n1 is greater than *n2 A value < 0 if *n1 is less than *n2 0 if the values are equalEXAMPLES
double list[LIST_SIZE];
// sizeof(*list) will continue to work if we change the data type
// We'll still need to change the cmp function, though
qsort(list, LIST_SIZE, sizeof(*list),
(int (*)(const void *, const void *))double_cmp);
SEE ALSO
qsort(3), heapsort(3), mergesort(3), bsearch(3)
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