23. Set Baud Rate Field in Control Register

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

uint32_t set_baud_rate(uint32_t reg, uint8_t baud) {
    // Your code here
    uint8_t baud_bits_len = 4;
    uint8_t baud_bits_pos = 8;
    uint32_t mask = (1U<<baud_bits_len)-1U;
    // Clean baud bits
    reg = reg & (~(mask<<baud_bits_pos));
    // Set baud bits
    reg = reg | ((baud & mask)<<baud_bits_pos);
    return reg;
}

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