Decode Status Register into Human-Readable Flags

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

#define BIT_MASK(p)  (1 << p)
#define BIT_CHECK(v, p) ((v) & BIT_MASK(p))

#define FLAG_MSG(s, p, m) if (BIT_CHECK((s), (p))) { printf("%s\n", (m)); }

void decode_status(uint8_t status_reg) {
    // Your logic here
    FLAG_MSG(status_reg, 0, "Power On");
    FLAG_MSG(status_reg, 1, "Error");
    FLAG_MSG(status_reg, 2, "Tx Ready");
    FLAG_MSG(status_reg, 3, "Rx Ready");
    FLAG_MSG(status_reg, 4, "Overheat");
    FLAG_MSG(status_reg, 5, "Undervoltage");
    FLAG_MSG(status_reg, 6, "Timeout");
    FLAG_MSG(status_reg, 7, "Reserved");
}

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

Solving Approach