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 res , bit , pos , pos1;
    for(pos=0 , pos1=0 ; pos<32 ; pos=pos+2)
    {
        bit = (reg>>pos)&1;
        res |= bit<<pos1;
        pos1++;
    }
    
    return res;
}

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