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 extract;
    uint32_t value;
    uint32_t i=0;
    // if want extract  value = (reg>>position)&mask;
    for(uint32_t pos ; pos <32; pos++)
    {
        
        if(pos % 2 == 0)
        {
           // extract 
            value = (reg>>pos)&0x1;
           //put in to extract 
           extract |= (value<<i);
           i+=1;
        }
    }
    return extract;
}

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

Solving Approach