Keep Only the Highest Set Bit

Code

#include <stdio.h>
#include <stdint.h>
// Complete the function
uint16_t highest_set_bit(uint16_t reg) {
    // Your logic here
    if ( reg == 0 ) return 0;
    else 
    {
    int i=15;
    while((reg & (1 << i)) == 0)
    {
        i--;
    }
    int a=1;
while ( i >0)
{
    a*=2;
    i--;
}
return a;
}
}
int main() {
    uint16_t reg;
    scanf("%hu", &reg);

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

Solving Approach