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 tmp = 0b11111; tmp <<= 10;
    tmp &= reg; tmp >>= 10;
    if (tmp < 31) tmp++;
    reg &= ~(0b11111 << 10);
    return reg | (tmp << 10);
}

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

Solving Approach