Extract and Modify Field in a 32-bit Register

Code

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

uint32_t update_register(uint32_t reg) {
    // Your logic here
        const uint8_t POS = 10;
    const uint32_t MASK = 0x1F << POS;   // 5-bit mask at position 10

    // Step 1: Extract field
    uint32_t field = (reg >> POS) & 0x1F;

    // Step 2: Increment if less than 31
    if (field < 31) {
        field = field + 1;
    }

    // Step 3: Clear old field
    reg &= ~MASK;

    // Step 4: Write updated field back
    reg |= (field << POS);

    return reg;
    //return 0;
}

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

Solving Approach