用联合确定计算机的字节顺序

#include <stdio.h>

union
{
    long Long;
    char Char[sizeof(long)];
} u;

int main(void)
{
    u.Long = 1;
    if (u.Char[0] == 1) {
        printf("Addressing is right-to-left\n");
    }
    else if (u.Char[sizeof(long) - 1] == 1) {
        printf("Addressing is left-to-right\n");
    }
    else {
        printf("Addressing is strange\n");
    }

    return 0;
}

用联合确定计算机的字节顺序

原文：http://blog.csdn.net/ieearth/article/details/45037047