Compress Interleaved Bits Reverse Bit Spreading

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

uint8_t compress_bits(uint16_t val) {
    // Your logic here
    int pos=0;
    int bit = 0;
    int reg = 0;
    for ( int i = 0; i < 16; i+=2){
    bit = ( val >> i) & 1;
    reg |= (bit << pos);
    pos++;
    }
    return reg;
}

int main() {
    uint16_t val;
    scanf("%hu", &val);

    uint8_t result = compress_bits(val);
    printf("%u", result);
    return 0;
}