Decode Status Register into Human-Readable Flags

Code

#include <stdio.h>
#include <stdint.h>

#define BIT_IS_SET(reg, bit)(((reg) & (1 << (bit))) != 0)

void decode_status(uint8_t status_reg) {
    uint8_t reg = status_reg;
    
    if(BIT_IS_SET(reg, 0)){
        printf("Power On\n");
    }
    if(BIT_IS_SET(reg, 1)){
        printf("Error\n");
    }
    if(BIT_IS_SET(reg, 2)){
        printf("Tx Ready\n");
    }
    if(BIT_IS_SET(reg, 3)){
        printf("Rx Ready\n");
    }
    if(BIT_IS_SET(reg, 4)){
        printf("Overheat\n");
    }
    if(BIT_IS_SET(reg, 5)){
        printf("Undervoltage\n");
    }
    if(BIT_IS_SET(reg, 6)){
        printf("Timeout\n");
    }
    if(BIT_IS_SET(reg, 7)){
        printf("Reserved\n");
    }
}

int main() {
    uint8_t reg;
    scanf("%hhu", &reg);
    decode_status(reg);
    return 0;
}

Solving Approach