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 mask=((reg>>10)&0x1f);
    if (mask<31)
    mask++;
    reg&=~(0x1F<<10);

    reg |=((mask&0x1F)<<10);

    return reg;
}

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