#include <iostream>
#include <stdio.h>

// 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
// O  A  A  R  R  R  0 1 D D D D D D D

int main()
{
	while (0==0) {

    unsigned int res = 0;
    char O;
    char A;
    char R;
    char key1 = 0;
    char key2 = 1;
    unsigned char D;

    printf("O - тип операции (0 - 1): ");
    scanf("%hhd", &O);

    printf("A - код области диска (0 - 3): ");
    scanf("%hhd", &A);

    printf("R - возможные реакции на ошибку (0 - 7): ");
    scanf("%hhd", &R);

    printf("D - номер диска (0 - 255): ");
    scanf("%hhd", &D);

    res |= ((unsigned char)O & 1) << 15;
    res |= ((unsigned char)A & 3) << 13;
    res |= ((unsigned char)R & 7) << 10;
    res |= ((unsigned char)key1 & 1) << 9;
    res |= ((unsigned char)key2 & 1) << 8;
    res |= D & 0xFF;

    printf("\nResult: %04x \n\n", res);
}
    system("pause");
    return 0;
}