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) {
    
    for (uint8_t i = 0; i < 4; i++) {
        if ((baud >> i) & 1) {
            // Set
            reg |= (1U << (i + 8));
        }
        else {
            // Reset
            reg &= ~(1U << (i + 8));
        }
    }

    return reg;
}

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