Compress Interleaved Bits Reverse Bit Spreading

Code

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

uint8_t compress_bits(uint16_t val) {
    uint8_t result = 0;
    int pos = 0;

    for (int i = 0; i < 16; i += 2) {  // take every 2nd bit
        uint8_t bit = (val >> i) & 1;  // extract the bit
        result |= (bit << pos);        // put it into result
        pos++;
    }

    return result;
}

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

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

Solving Approach