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
    uint32_t temp=0;
    int i=0,j=0;

    while(i<32){
        if(reg & (1<<i)){
            temp |= (1<<j);
        }else{
            temp |= (0<<j);
        }
        i+=2;
        ++j;
    }
    return temp;
}

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

Solving Approach