Extract and Modify Field in a 32-bit Register

Code

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

uint32_t update_register(uint32_t reg) {
    uint32_t mask = reg & (0x1F << 10);
    reg = reg & ~(0x1F << 10);
    mask = mask >> 10;
    if(mask < 31){
        mask+=1;
    }
    mask = mask << 10;
    reg = reg | mask;
    return reg;
}

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

Solving Approach