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

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

uint32_t update_register(uint32_t reg) {
    uint16_t mask = (reg>>10) & 0x1F;
    if ( mask < 31){
        mask++;
        reg &= (~0x1F << 10);
        reg |= (mask << 10);
    }
    return reg;
}

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