Extract Even Bits Only from 32-bit Register

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

uint32_t extract_even_bits(uint32_t reg) {
    uint16_t reg1=0;
  for(int i=0,j=0;i<32;i+=2,j++)
  {
    if(reg & (1<<i))
    reg1 |= (1<<j);
    
  }
  return reg1;
}

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

Solving Approach