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 pos = 8;
    uint8_t len = 4;
    uint32_t mask = ((1U << len)-1 ) << pos;

    reg &= ~mask;//clear bits 8-11

    reg |= ((uint32_t)(baud & 0xF)) << pos;  // set bits 8-11
    return reg;
}

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