Extract Even Bits Only from 32-bit Register

Code

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

uint32_t extract_even_bits(uint32_t reg) {
    uint32_t res = 0;
    uint32_t op = 0;
    for(int i = 0;i<32;i+=2)
    {
        uint32_t bit = (reg >> i) & 1u;
        res = res|(bit <<op);
        op++;
    }
    
    return res;
}

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

Solving Approach

run the loop extract the even positioned bits ,  push it into result