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 outpos=0;
    uint32_t val=0;

    for (uint8_t i = 0; i < 32; i += 2){
        uint32_t pos= (reg>>i)&1;
        val|=(pos<<outpos);
        outpos++;
        //Input: reg = 0b0101 0101 
        //Output: 0b1111
    }
    return val;
}

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