如何判断字节序大小端

#include <stdio.h>
#include <arap/inet.h>

int main()
{
    uint32_t pa = 0x01020304;
    uint8_t pb = (uint8_t)pa;
  
    if (pb == 1)
        printf("Big-Endian\n");
    else
        printf("Little-Endian\n");


}