Extract Even Bits Only from 32-bit Register

Code

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

uint32_t extract_even_bits(uint32_t reg) {
    int extract,  x =0;
    for(int i=30;i>=0;i-=2) {
        //extract = ((reg>>i) &1);
        x = (x<< 1) | (((reg>>i) &1)&1);
    }
    // Your code here
    return x;
}

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

Solving Approach