big endian&little endian test

/*

 * main.cpp

 *

 *  Created on: Jun 8, 2011

 *      Author: xq

 */



#include<iostream>

#include<stdint.h>

using namespace std;



int is_little_endian(void)

{

uint16_t flag=0x1324;

uint8_t flag2=*(uint8_t*)&flag;

if(flag2==0x24)

return 1;

else

return 0;

}







int main()

{

if(is_little_endian)

cout<<"little endian\n";

else

cout<<"big endian\n";

union endian_un

{

short flag;

char bits[sizeof(short)];

};

union endian_un flag;

flag.flag=0x1234;

if(flag.bits[0]==0x12&&flag.bits[1]==0x34)

cout<<"big endian\n";

else if(flag.bits[0]==0x34&&flag.bits[1]==0x12)

cout<<"little endian\n";

else

cout<<"error\n";

return 0;

}

Output:

little endian

little endian