Keep Only the Highest Set Bit

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

// Complete the function
uint16_t highest_set_bit(uint16_t reg) {
    // Your logic here
    uint16_t temp = reg;
    if(temp == 0) return 0;
    for(int i=15; i>=0; i--)
    {
        uint16_t mask;
        mask |= (1 << i);
        if((temp & mask) >> i)
            return(temp & mask);
    }
    
}

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

    uint16_t result = highest_set_bit(reg);
    printf("%hu", result);
    return 0;
}