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
    
    int j = 0, reg1 = 0;
    for(int i = 0; i < 32; ++i){
        if( i % 2 == 0){
            reg1 |= ((reg >> i) & 0x1) << j;
            j++;
        }
    }
    return reg1;
}

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

Solving Approach