#include <stdio.h>

#define FLAG_POWER 0x1
#define FLAG_ERROR 0x2 
#define FLAG_READY 0x4 

int main(){

    int status = 0;

    // set up power and ready 
    status |= FLAG_POWER;
    status |= FLAG_READY;

    //check up
    if(status & FLAG_ERROR){
        printf("ERROR\n");
    }
    else{
        printf("NO ERROR\n");
    }

    // set off ready
    status &= ~FLAG_READY;
    printf("status = %d\n", status);
    return 0;
}