名前空間
変種
操作

qsort

提供: cppreference.com
< c‎ | algorithm

Defined in header <stdlib.h>
void qsort( const void *ptr, size_t count, size_t size,
            int (*comp)(const void *, const void *) );
ソートが指定された配列を昇順でptrが指す。配列はsizecountsize要素が含まれています。関数はcompがオブジェクトの比較に使用される、によって指さ.
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.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

目次

[編集] パラメータ

ptr -
ソートする配列へのポインタ
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 -
配列内の要素の数
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 -
バイト単位で配列内の各要素の大きさ
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(const void *a, const void *b);

The function must not modify the objects passed to it.

[編集] 値を返します

(なし)
Original:
(none)
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

[編集]

次のコードをソートqsort()を使用して整数の配列
Original:
The following code sorts an array of integers using qsort()
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

#include <stdio.h>
#include <stdlib.h>
 
int compare_ints(const void* a, const void* b)
{
    const int *arg1 = a;
    const int *arg2 = b;
 
    return *arg1 - *arg2;
}
 
int main(void)
{
    int i;
    int ints[] = { -2, 99, 0, -743, 2, 3, 4 };
    int size = sizeof ints / sizeof *ints;
 
    qsort(ints, size, sizeof(int), compare_ints);
 
    for (i = 0; i < size; i++) {
        printf("%d ", ints[i]);
    }
 
    printf("\n");
 
    return EXIT_SUCCESS;
}

Output:

-743 -2 0 2 3 4 99

[編集] も参照してください

不特定の型の要素の配列を検索します
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.

(機能) [edit]