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) {
    int j=8,i;
    uint32_t bit,res=0;
    for(i=0;i<4;i++){
        bit=(baud>>i)&1;
        res|=(bit<<j);
        j++; }
    for(i=8;i<=11;i++){
    reg&=~(1<<i);}
    reg|=res;
    
    return reg;
}

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