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
    uint16_t newReg = 0;
    /*
    // regular way
    
    for (uint8_t i = 0; i < 32; i += 2)
    {
        if (reg & (1 << i))
        {
            newReg |= (1 << (i/2));
        }
    }
    */
    /*
    extract bit from reg
    value = (reg >> i) & 0x01
    newReg |= value
    */
    for (uint8_t i = 0; i < 32; i += 2)
    {
        newReg |= (((reg >> i) & 0x01) << i/2);
    }
    


    return newReg;
}

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