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
            const uint8_t pos = 8;
            const uint8_t len = 4;
            uint32_t mask = ((1u << len) - 1u) << pos;
            reg &= ~mask;
            reg |= (baud & 0xF) << 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;
}