To find out big endian or little endian

int main()
             unsigned int i = 1;
             char *c = (char*)&i;
             if (*c)
                   printf("Little endian");
                   printf ("Big endian");
             getchar ();
          return 0;
In the above program, a character pointer c is pointing to an integer i. Since size of character is 1 byte when the character pointer is de-referenced it will contain only first byte of integer. If machine is little endian then *c will be 1 (because last byte is stored first) and if machine is big endian then *c will be 0.

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