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 bit_field = (reg >> 10) & 0x1F;
    if (bit_field < 31)
        bit_field ++;    
    return (reg & ~(((1 << 5)-1) << 10)) | ((((1 << 5)-1)&bit_field) << 10);
}

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