#include <stdio.h>

void print_binary(unsigned int number) {
    for(int i = 7; i >= 0; --i) {
        putchar('0' + ((number >> i) & 1));
        if(i % 4 == 0 && i != 0)
            putchar(' ');
    }
    putchar('\n');
}

int main() {
    unsigned int num = 64; // 0100 0000
    int pos = 3;
    int n = 2;

    printf("Initial number: ");
    print_binary(num);

    printf("\n---- Mask 1 ----\n");
    unsigned int mask1 = (1 << n) - 1;
    printf("(1 << n) - 1: ");
    print_binary(mask1);
    mask1 <<= pos;
    printf("<< pos: ");
    print_binary(mask1);

    unsigned int result1 = num | mask1;
    printf("Result 1: ");
    print_binary(result1);

    printf("\n---- Mask 2 ----\n");
    unsigned int mask2 = (1 << n) - 1;
    printf("(1 << n) - 1: ");
    print_binary(mask2);
    mask2 <<= (pos - n + 1);
    printf("<< (pos - n + 1): ");
    print_binary(mask2);

    unsigned int result2 = num | mask2;
    printf("Result 2: ");
    print_binary(result2);

    return 0;
}