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
char  bit_shift=0;
uint32_t result;
uint32_t mask =0x01;
    for(char i=0;i<31;i=i+2){
        if((reg>>i)&mask){
            result |= ( mask << bit_shift);
            }
            bit_shift ++;
    }
    return result;
}

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

Solving Approach