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

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

#define target_pos      10
#define target_mask     0x1F 

uint32_t update_register(uint32_t reg) {
    // Your logic here
    uint32_t val = (reg >> target_pos) & 0x0000001F;

    if (val < 31) {
        reg = (reg & (~(target_mask) << target_pos)) | ((val + 1) << target_pos);
    }
    return reg;
}

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