//The bitwise operators abstract away the endianness. 
//For example, the >> operator always shifts the bits towards the least significant digit.
 
#include <stdio.h>
#include <stdint.h>

int main(void) {
    FILE *f1 = fopen("test1", "w");
    FILE *f2 = fopen("test2", "w");
     
    uint16_t x = 0xABCD;
    fwrite(&x, 2, 1, f1);

    uint8_t low_byte  = x & 0xFF;
    uint8_t high_byte = x >> 8;
    
    fputc(low_byte, f2);
    fputc(high_byte, f2);
    
    fclose(f1);
    fclose(f2);


    return 0;
}