qsort

 

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Algoritmos

qsort

bsearch

 

Defined in header <stdlib.h>
void qsort( const void *ptr, size_t count, size_t size,             int (*comp)(const void *, const void *) );

Ordena el array dado que apunta ptr en orden ascendente. La matriz contiene elementos count de size tamaño. Función a la que apunta comp se utiliza para la comparación de objetos .

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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Parámetros

ptr	-	puntero a la matriz a ordenar 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	-	número de elemento de la matriz 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	-	tamaño de cada elemento de la matriz en bytes 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. ​

Valor de retorno

(Ninguno)

Original:

(none)

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Ejemplo

El código siguiente, una matriz de enteros utilizando qsort()

Original:

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

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#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

Ver también

bsearch	busca en una matriz de un elemento de tipo no especificado 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. (función)
C++ documentation for qsort