Extract Even Bits Only from 32-bit Register

Code

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

uint32_t extract_even_bits(uint32_t reg) {
    uint16_t index = 0;
    uint16_t result = 0; 
    for(int i=0;i<32;i++)
    {
        if(i%2 == 0){
            if(reg & 1<<i) result |= 1<<index;
        index++;
        }
    }
    return result;
    return 0;
}

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

Solving Approach