[C Language] use the callback function to Implement Bubble Sorting

[C Language] use the callback function to Implement Bubble Sorting
Function: You can sort the integer or string as follows:

#include <stdio.h>#include <string.h>int int_cmp(const void *p1, const void *p2){    if (*(int *)p1 > *(int *)p2)    {        return 1;    }    else if (*(int *)p1 == *(int *)p2)    {        return 0;    }    else    {        return -1;    }}void swap(void *p1, void *p2, int size){    int i = 0;    for (i = 0; i < size; i++)    {        char tmp = *((char *)p1 + i);        *((char *)p1 + i) = *((char *)p2 + i);        *((char *)p2 + i) = tmp;    }}void bubble(void *base, int count, int size, int(*cmp)(const void *, const void *)){    int i = 0;    int j = 0;    for (i = 0; i < count - 1; i++)    {        for (j = 0; j < count - i - 1; j++)        {            if (cmp((char *)base +size*j,(char *)base+size*(j+1))>0)            {                swap((char *)base + size*j, (char *)base + size*(j + 1), size);            }        }    }}int str_cmp(const void *p1, const void *p2){    return strcmp((char *)(*(int *)p1), (char *)(*(int *)p2));}int main(){    //int arr[] = { 1, 3, 5, 7, 9, 2, 4, 6, 8, 0 };    char *arr[] = { "dddd", "bbbb", "cccc", "aaaa" };    int i = 0;    bubble(arr, sizeof(arr) / sizeof(arr[0]), sizeof(char *), str_cmp);    for (i = 0; i < 4; i++)    {        printf("%s\n", arr[i]);    }    printf("\n");    return 0;}