26. Extract and Modify Field in a 32-bit Register

#include <stdio.h>
#include <stdint.h>

uint32_t update_register(uint32_t reg){
    uint32_t d;
    d = (reg >> 10) & 0x1F;
    if(d < 31){
        d++;
    }
    d = (d << 10) | (reg & ~(0x0F << 10));
    return d;
}

int main() {
    uint32_t reg;
    scanf("%u", &reg);
    uint32_t updated = update_register(reg);
    printf("%u", updated);
    return 0;
}