#include <stdio.h>

int main(void) {

    unsigned char flags = 0b0000010;

    unsigned char FLAG_A = 1u << 0;
    unsigned char FLAG_B = 1u << 1;

    printf("El FLAG_A es: %08b\n", FLAG_A);
    printf("El FLAG_B es: %08b\n", FLAG_B);

    // encender ambos.
    flags = (FLAG_A | FLAG_B);

    if (flags & (FLAG_A)) {
        printf("El flag A esta encendido\n");
    }

    if (flags & (FLAG_B)) {
        printf("El flag B esta encendido\n");
    }

    return 0;
}