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
    // create mask
    //uint32_t mask = ((1U << 4) - 1)
    // clear old bits
    //reg &= ~(mask << 11);
    // set new bits
    //reg |= ((baud & mask) << pos);
    reg &= ~(((1U << 4) - 1) << 8);
    return reg |= ((((1U << 4) - 1) & baud) << 8) ;
}

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