22. Extract Even Bits Only from 32-bit Register

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

uint32_t extract_even_bits(uint32_t reg) {
    uint8_t count = 0;
    uint16_t val = 0x0;

    while(count < 16)
    {
       val |= (((reg >> (count*2)) & 0x1) << count);
       count++;
    }
    
    return val;
}

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