字节序检测小程序

/*
 * =====================================================================================
 *
 *       Filename:  endian_check.c
 *
 *    Description:  字节序检测
 *
 *        Version:  1.0
 *        Created:  04/12/2012 05:49:08 PM
 *       Revision:  none
 *       Compiler:  gcc
 *
 *         Author:  He Wei Ping (hwp195), [e-mail]
 *   Organization:
 *
 * =====================================================================================
 */

#include <stdio.h>

int main(int argc, char *argv[])
{
    union{
    int x;
    char c[4];
    }value;

    value.x = 0x0a0b0c0d;
#if __BYTE_ORDER == __LITTLE_ENDIAN
    fprintf(stdout, "--------> Little endian <--------");
#elif __BYTE_ORDER == __BIG_ENDIAN
    fprintf(stdout, "--------> Big endian <--------");
#else
#error    "Please fix "
#endif

    putchar('\n');
    int i;
    fprintf(stdout, "%-13s%-8s\n","  Address", "     Value");
    for(i = 0; i < 4; i ++)
    {
    fprintf(stdout, "%10p ---> %#04x\n", &value.c[i], value.c[i]);
    }
    fprintf(stdout, "\n");
    return 0;
}