22. Extract Even Bits Only from 32-bit Register

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

uint32_t extract_even_bits(uint32_t reg) {
    // Your code here
    uint8_t val = 0;
    uint32_t even_bits = 0;

    for (int i = 0; i < 32; i += 2) {
        val = (reg >> i) & 0x01;
        even_bits |= (val << i/2);
    }
    return even_bits;
}

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