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

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

uint32_t update_register(uint32_t reg) {
    uint8_t value= (reg>>10) & 0x1F;
    uint32_t mask=((1<<5)-1)<<10;
    reg &= ~mask;
    if (value < 31){
    value++;
    }
    return reg|= value<<10;
}

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