Extract Even Bits Only from 32-bit Register

Code

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

uint32_t extract_even_bits(uint32_t reg) {
    // Your code here
    uint8_t count =0;
    while(reg>0){
        if(reg & 1){
            count++;
        }
        reg = reg >> 2;
    }

    return ((1<<count)-1);
}

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

Solving Approach