Showing Big/Little Endian?

Question

I need to write a small C program to demonstrate that the UNIX operating system is using Big Endian, and the MS-Windows/DOS system is using Little Endian. I'm having trouble putting my thoughts into code (beginner coder) but I'm assuming I can load a 32 bit word into an address and just check where the LSB is, but then again I'm still a beginner.

Can anyone help me out?

Answer 1

#include <stdio.h>

int main() 
{
   unsigned int i = 1;

   char *c = (char*)&i;

   if (*c) {  
       printf("Little endian");
   } else {
       printf("Big endian");
   }

   getchar();

   return 0;
}