如何用程序确认当前系统的存储模式

请编写一个函数，若处理器是big_endian,则返回1,；若处理器是small_endian,则返回0

                 #include<iostream>

                 #include<stdio.h>

                using namespace std;

                union check

               {

                       int i;

                      char c;

                }u;

             int main()

            {    

                    u.i=1;

                   if(u.c==1)

                         cout<<"大端模式";

                 else

                         cout<<"小端模式"     

                }