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) 
{
    uint32_t result = 0x00;
    uint32_t val = 0x00;
    uint32_t mask = 0b1111;

    for(int i = 8; i < 12; i++) 
    { 
        result = ((reg >> i) & mask); 
        result = result << 8;
        reg = reg & ~result;
        val = (baud << 8);
        reg = reg | val;
    } 


    return reg;
}

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