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
    int n = 0;
    int highest = 0;
    for(int i=0 ; i<=15 ; i++)
    {
        int mask = 1<<n;
        if( (reg&mask)>0)
        {
            highest = n;
            
        }
        n++;

    }
    int mask = 1<<highest;
    return reg&mask;    
}

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

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