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 = 0; 
    uint32_t bitRun = 0;
    uint32_t bitCount = sizeof(reg) * 8 ;
    for(uint8_t n = 0 ; n < bitCount ; n++)
    {
        if(n%2 == 0)
        {
            res |= ((reg>>n) & 0x01 )<<bitRun;
            bitRun++;
        }
    }

    return res;
}

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