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

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

uint32_t update_register(uint32_t reg) {
    //Extract value.
    uint32_t val = (reg >> 10) & 0x1F;
    //Clear value from reg.
    reg &= ~(0x1F << 10);
    //Operate on value.
    if (val < 31) val++;
    //Set new value.
    return reg |= (val << 10);
}

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