Little and Big Endian

In my early college days, I saw some notes on typecasting. writer was trying to explain
typecasting with an example code given below:

#include<stdio.h> 

int main()

{

    int x=0xA2213014;

    printf("Typecasted Output: %d\n",*(char*)&x);

    return 0;

}

Output:
Typecasted Output: 162

But when I compiled and executed same example on my desktop, the output was
Typecasted Output: 20

One thought came in my mind "people write any thing". Later when I came to know about endian, then I understood that he must have run the program on any big endian machine.
It is important to understand endianness to write a portable program. I am trying to explain it in my presentation.

Your suggestions are alaways welcome. Please provide your feedback to improve it.