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
    uint16_t val = 0;
    for(uint8_t b = 0; b < 16; b++)
    {
        val |= ((reg >> (b * 2U)) & 1U) << b;
    }
    return val;    
}

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