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 field;
    field = (reg >> 10) & 0x0000001F;
    if (field < 31) 
        field++;
    field = (field << 10);
    reg = reg & 0xFFFF03FF;
    reg = reg | field;
    return reg;
}

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

Solving Approach