Extract Even Bits Only from 32-bit Register

Code

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

uint32_t extract_even_bits(uint32_t reg) {
    // Your code here
    uint32_t even=0;
    for (int i = 0; i<16; i++)
    {
        if(reg&(1<<(2*i)))
        {
            even |= (1<<i);
        }
    }
    return even;
}

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

Solving Approach