Bit Spreading Interleave Bits with Zeros

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

uint16_t spread_bits(uint8_t val) {
    // Your logic here
    volatile uint16_t c=0;
    volatile uint8_t count=0;
    for(int i=0;i<15;i++){
        if(i%2==0){
        uint8_t d=0;   
        d= val &(1<<count);
        count++;
        if(d){
         c |= (1<<i);
        }else{
            c &= ~(1<<i);
        }
        }
        else{
        c &= ~(1<<i);

        }
    }
    return c;
}

int main() {
    uint8_t val;
    scanf("%hhu", &val);

    uint16_t result = spread_bits(val);
    printf("%u", result);
    return 0;
}