Compress Interleaved Bits Reverse Bit Spreading

Code

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

uint8_t compress_bits(uint16_t val) {
    uint8_t r=0;
    val= val<<1;
    for(int i=0; i<8; i++)
    { 
        r= r<<1; 
        r= r | ((val & 0x8000)>>15);
        val=val<<2;;
    }
    return r;
}

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

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

Solving Approach