Compress Interleaved Bits Reverse Bit Spreading

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

uint8_t compress_bits(uint16_t val) {
    // Your logic here
    uint16_t digit;
    uint16_t result;
    for(int8_t i = 7; i > -1 ; i--)
    {
        digit = val >> (i*2);
        digit = digit & 0x0001;
        result = result | (digit << i);
    }
    return (result & 0xFF);
}

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

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