c:stdlib.h:bsearch
Differences
This shows you the differences between two versions of the page.
| — |
c:stdlib.h:bsearch [2024/02/16 01:04] (current) |
||
|---|---|---|---|
| Line 1: | Line 1: | ||
| + | {{keywords>wiki library source code example reference}} | ||
| + | ===== bsearch ===== | ||
| + | |||
| + | <code c> | ||
| + | #include <stdlib.h> | ||
| + | void *bsearch(const void *key, const void *base, size_t nitems, size_t size, int (*compare)(const void *, const void *)); | ||
| + | </code> | ||
| + | |||
| + | |||
| + | **key** - The element that is searched for\\ | ||
| + | **base** - pointer to the first element of the array to be searched\\ | ||
| + | **nitems** - number of elements in the array\\ | ||
| + | **size** - size of a single element\\ | ||
| + | **compare** - comparison function to compare two elements together.\\ | ||
| + | |||
| + | == return values: == | ||
| + | pointer to an entry in the array that matches the search key.\\ | ||
| + | If key not found, NULL pointer returned.\\ | ||
| + | |||
| + | ===== bsearch c Sourcecode Example ===== | ||
| + | <code c> | ||
| + | #include <stdio.h> /* including standard library */ | ||
| + | //#include <windows.h> /* uncomment this for Windows */ | ||
| + | |||
| + | #include <stdlib.h> | ||
| + | #include <string.h> | ||
| + | |||
| + | int main ( void ) | ||
| + | { | ||
| + | char my_key[10] = "bsearch"; | ||
| + | int my_elementCount = 4; | ||
| + | int my_size = 20; | ||
| + | char my_strings[][30] = {"c", "example", "bsearch", "coderefer" , "someusefulinformation"}; | ||
| + | |||
| + | /* strcmp is the compare function for this bsearch */ | ||
| + | char *return_value = (char*) bsearch(my_key, my_strings, my_elementCount, my_size, (int(*)(const void*, const void*))strcmp); | ||
| + | |||
| + | if (return_value) { | ||
| + | printf("Found \"%s\" in the my_strings array.\n", return_value); | ||
| + | } | ||
| + | else { | ||
| + | printf("Did not found \"%s\" in the my_strings array.\n", my_key); | ||
| + | } | ||
| + | |||
| + | return 0; | ||
| + | } | ||
| + | |||
| + | </code> | ||
| + | |||
| + | ==== output of bsearch(): ==== | ||
| + | user@host:~$ ./bsearch | ||
| + | Found "bsearch" in the my_strings array | ||
| + | |||
| + | |||
on the occasion of the current invasion of Russia in Ukraine
c/stdlib.h/bsearch.txt · Last modified: 2024/02/16 01:04 (external edit)
Page Tools
Except where otherwise noted, content on this wiki is licensed under the following license: CC Attribution-Share Alike 3.0 Unported
