#include  <stdio.h>
#include  <stdlib.h>

#define   BUF_SIZE      10
#define   RAND_NUM_MAX  100

unsigned char buf[BUF_SIZE] = {0};

//===串列埠列印=================================
int fputc(int ch, FILE * stream)
{
    HAL_UART_Transmit(&huart1, (unsigned char *)&ch, 1, HAL_MAX_DELAY);
    return ch;
}

//===回撥比較函式，注意陣列型別和回撥匹配===========
int compare_char(const void *a, const void *b)
{
    return (*(char *)a) - (*(char *)b);
}

int compare_int(const void *a, const void *b)
{
    return (*(int *)a) - (*(int *)b);
}

//===產生隨機數排序=============================
void rand_num(void)
{
    unsigned int i;
    
    for(i = 0; i < BUF_SIZE; i++)
    {
        srand(HAL_GetTick());    //設定隨機數種子
        HAL_Delay(1);            //等待改變種子
        buf[i] = rand()%(RAND_NUM_MAX + 1);
        printf("%d ", buf[i]);
    }

    //---排序----------------------------
    qsort(buf, BUF_SIZE, sizeof(buf[0]), compare_char);
    
    printf("\r\n");
    for(i = 0; i < BUF_SIZE; i++)
        printf("%d ", buf[i]);
}