#include <stdio.h>
#include <stdbool.h>
#if 0
bool isBigEndian(void)
{
int var = 0x12345678;
char *p = (char *)&var;
return *p == 0x12;
}
#endif
#if 0
bool isLittleEndian(void)
{
int var = 1;
char *p = (char *)&var;
return *p == 1;
}
#else
bool isLittleEndian(void)
{
union {
char c;
int d;
} endian = {0};
endian.c = 1;
return endian.d;
}
#endif
int main(void)
{
//printf("Your CPU is \"%s\"!\n", isBigEndian() ? "Big Endian" : "Little Endian");
printf("Your CPU is \"%s\"!\n", isLittleEndian() ? "Little Endian" : "Big Endian");
return 0;
}判断机器是大端小端
原文：http://blog.csdn.net/huanghaiyan_123/article/details/40403921
