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Function Details : qsort

voidqsort(void * base,size_t num,size_t size,int (*)(const void *, const void *) compar) ;

Return Type : void

Type that indicates no return value
Read about return values of qsort function .

1st Parameter Type : void *

New Generic pointer that can point to any data type

1st Parameter

Pointer to the base of the array to be sorted.

2nd Parameter Type : size_t

Platform-specific unsigned type for array indices and memory sizes.

2nd Parameter

The number of elements in the array.

3rd Parameter Type : size_t

Platform-specific unsigned type for array indices and memory sizes.

3rd Parameter

The size in bytes of each element in the array.

4th Parameter Type : int (*)(const void *, const void *)

Pointer to a function that takes two constant void pointers as arguments and returns an integer, typically used to compare two elements.

4th Parameter

Pointer to a comparison function that determines the order of elements. It takes two `const void *` arguments and returns a negative, zero, or positive value based on the comparison.

Read more about parameters of qsort in parameters section
The qsortfunction in C language Sorts an array of elements using the quicksort algorithm.
The qsort function implements a quick sort algorithm to sort an array of any type. It sorts the array in-place, and uses a comparison function provided by the caller to determine the order of elements. This function is highly efficient and widely used for sorting arrays of various data types.
The qsortfunction takes 4 parameters:
  • •
    void * `base`: Pointer to the base of the array to be sorted.
  • •
    size_t `num`: The number of elements in the array.
  • •
    size_t `size`: The size in bytes of each element in the array.
  • •
    int (*)(const void *, const void *) `compar`: Pointer to a comparison function that determines the order of elements. It takes two `const void *` arguments and returns a negative, zero, or positive value based on the comparison.
Performs a quicksort on the array pointed to by `base`, sorting `num` elements of size `size` bytes each. The comparison function `compar` is used to define the order of the elements. This function does not return a value, and the array is sorted in place.
The qsort function return value :
  • This function does not return a value

Output

This example demonstrates how to use qsort to sort an array of integers in ascending order. It defines a comparison function that determines the order of elements.