23. Set Baud Rate Field in Control Register

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

#define MASK(BITS) ((1 << (BITS)) - 1)
#define SHIFTED_MASK(POS, BITS) ((MASK(BITS)) << (POS))

uint32_t set_baud_rate(uint32_t reg, uint8_t baud) {
    // Your code here

    return (reg & ~SHIFTED_MASK(8, 4)) | (((uint32_t) baud) << 8);
}

int main() {
    uint32_t reg;
    uint8_t baud;
    scanf("%u %hhu", &reg, &baud);
    printf("%u", set_baud_rate(reg, baud));
    return 0;
}