Bit Spreading Interleave Bits with Zeros

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

#define SET_BIT(r, b)    ((r) |= (1 << (b)))
#define CLEAR_BIT(r, b)  ((r) &= ~(1 << (b)))

uint16_t spread_bits(uint8_t val) {
    // Your logic here
    uint16_t New_Val = 0;
    short pos; 
  
    for(int i=0; i<=15; i++)
    {
        if(i%2 ==0)
        {
            pos = i/2;
            if(val & (1<<pos))
                SET_BIT(New_Val,i);
            else 
                CLEAR_BIT(New_Val,i);  
        }
        else
        {
           CLEAR_BIT(New_Val,i);  
        } 
    }

    return New_Val;
}

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

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