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 mask=(1<<5)-1;
    uint8_t val=(reg>>10)&mask;
    if(val<31) val+=1;
    val=val&mask;
    reg&=~(mask<<10);
    reg|=(val<<10);
    return reg;
}

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