Extract and Modify Field in a 32-bit Register

Code

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

uint32_t update_register(uint32_t reg) {
    uint32_t mask = 0x1F; // 5 bits 
    uint32_t extracted = (reg >> 10) & mask; 
    if (extracted < 31){ 
        // printf("extracted %d \n", extracted); 
        extracted ++; 
        // printf("extracted after %d \n", extracted); 
        reg &= ~(mask << 10); 
        reg |= extracted << 10; 
    }
        return reg; 
    
}

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

Solving Approach