22. Extract Even Bits Only from 32-bit Register

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

uint32_t extract_even_bits(uint32_t reg) {
    uint16_t ans = 0;
    uint8_t cout = 0;
    for (uint8_t i = 0; i <= 30; i+=2) {
        uint16_t bit_even = (reg >> i) & 1;
        ans |= (bit_even << cout);
        cout ++;
    }
    return ans;
}

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