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
    uint32_t mask;
    uint8_t start = 8, end = 11 ;
    mask = ((1 << (end - start) + 1) - 1) << start;
    reg &= ~mask;
    reg |= ((uint32_t)baud << start) & mask;


    return reg;
}

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