22. Extract Even Bits Only from 32-bit Register

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

uint32_t extract_even_bits(uint32_t reg) {
    
    uint32_t result = 0x00000000; 
    uint8_t index = 0x0000;
    for(uint8_t i=0 ; i<32 ; i+=2)
    {
        if(reg & (1 << i))
        {

           result |= (1<<index);
           index++;
        }
    }
    return result;
}

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