22. Extract Even Bits Only from 32-bit Register

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

uint32_t extract_even_bits(uint32_t reg) {
    // Your code here
    uint32_t x = 0;
    int pos = 0 ;
    for( int i = 0 ; i < 32 ; i = i+2){
        uint32_t a =(reg >> i) & 1;
        x = x | (a << pos);
        pos++;
    }
    reg = x;
    return reg;
}

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