A PROG. To Find out the machine is Little or Big endian

Try to know first concept of how data store in little & big endian machine register.Then take the concept of pointer,& try to understand this code.

#include<stdio.h>
int main(void)
{
    int i=1;
    if((*(char*)&i)==1)
         printf("The machine is little endian.
");
    else
         printf("The machine is big endian.
");
    return 0;
}