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     = 0x1F;
    uint32_t mask_pos = mask << 10;

    uint32_t value = (reg & mask_pos) >> 10;

    if (value < 31) {
        value += 1;
    }

    reg = (reg & ~mask_pos) | (value << 10);

    return reg;
}

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