std::qsort

 

C++

Linguaggio

Concetti

Libreria di Utilità

Stringhe

Contenitori

Algoritmi

Iteratori

Libreria matematca

Input/output

Localizzazione

Espressioni regolari(C++11)

Operazioni atomicche(C++11)

Multithreading(C++11)

 

Algoritmo libreria

Funzioni Original: Functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
Non modifica le operazioni di sequenza Original: Non-modifying sequence operations The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
all_of any_of none_of (C++11) (C++11) (C++11) for_each count count_if mismatch equal	find find_if find_if_not (C++11) find_end find_first_of adjacent_find search search_n
Modifica delle operazioni di sequenza Original: Modifying sequence operations The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
copy copy_if (C++11) copy_n (C++11) copy_backward move (C++11) move_backward (C++11) fill fill_n transform generate generate_n remove remove_if remove_copy remove_copy_if	replace replace_if replace_copy replace_copy_if swap swap_ranges iter_swap reverse reverse_copy rotate rotate_copy random_shuffle shuffle   (C++11) unique unique_copy
Partizionamento operazioni Original: Partitioning operations The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
is_partitioned (C++11) partition partition_copy (C++11)	stable_partition partition_point (C++11)
Ordinamento delle operazioni (su intervalli ordinati) Original: Sorting operations (on sorted ranges) The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
is_sorted (C++11) is_sorted_until (C++11) sort	partial_sort partial_sort_copy stable_sort nth_element
Binarie (le operazioni di ricerca sui campi ordinati) Original: Binary search operations (on sorted ranges) The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
lower_bound upper_bound	binary_search equal_range
Impostare le operazioni (su intervalli ordinati) Original: Set operations (on sorted ranges) The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
merge inplace_merge includes	set_difference set_intersection set_symmetric_difference set_union
Heap operazioni Original: Heap operations The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
is_heap is_heap_until (C++11) make_heap	push_heap pop_heap sort_heap
Minimo / massimo le operazioni Original: Minimum/maximum operations The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
max max_element min min_element minmax (C++11) minmax_element (C++11)	lexicographical_compare is_permutation (C++11) next_permutation prev_permutation
Operazioni numeriche Original: Numeric operations The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
iota (C++11) accumulate inner_product	adjacent_difference partial_sum
Libreria C Original: C library The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
qsort	bsearch

 

Defined in header <cstdlib>
void qsort(constvoid*ptr, size_t count, size_t size,             int(*comp)(constvoid*, constvoid*));

Ordina l'array dato puntato da ptr in ordine crescente. La matrice contiene elementi count di size dimensioni. Funzione puntato da comp viene utilizzato per confronto oggetto.

Original:

Sorts the given array pointed to by ptr in ascending order. The array contains count elements of size size. Function pointed to by comp is used for object comparison.

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Parametri

ptr	-	puntatore alla matrice da ordinare Original: pointer to the array to sort The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
count	-	numero di elemento della matrice Original: number of element in the array The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
size	-	dimensione di ciascun elemento della matrice in byte Original: size of each element in the array in bytes The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
comp	-	comparison function which returns ​a negative integer value if the first argument is less than the second, a positive integer value if the first argument is greater than the second and zero if the arguments are equal. The signature of the comparison function should be equivalent to the following:  int cmp(constvoid*a, constvoid*b); The function must not modify the objects passed to it. ​

Valore di ritorno

(Nessuno)

Original:

(none)

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Note

Tipo degli elementi della matrice deve essere un banale tipo, altrimenti il ​​comportamento è indefinito.

Original:

The type of the elements of the array must be a trivial type, otherwise the behavior is undefined.

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Esempio

Il codice seguente ordina un array di numeri interi che utilizzano qsort() .

Original:

The following code sorts an array of integers using qsort().

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#include <iostream>#include <cstdlib>   int compare_ints(constvoid* a, constvoid* b)// comparison function{int* arg1 =(int*) a;int* arg2 =(int*) b;if(*arg1 <*arg2)return-1;elseif(*arg1 ==*arg2)return0;elsereturn1;}   int main(){int a[]={-2, 99, 0, -743, 2, 3, 4};int size =7;   std::qsort(a, size, sizeof(int), compare_ints);   for(int i =0; i < size; i++){std::cout<< a[i]<<" ";}std::cout<<'\n';}

Output:

-743 -2 0 2 3 4 99

Vedi anche

bsearch	cerca una matrice per un elemento di tipo non specificato Original: searches an array for an element of unspecified type The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (funzione)
sort	ordina una serie in ordine crescente Original: sorts a range into ascending order The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (funzione di modello)
is_trivial (C++11)	Verifica se un tipo è banale Original: checks if a type is trivial The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (classe template)
C documentation for qsort