Keep Only the Highest Set Bit

Code

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

uint16_t highest_set_bit(uint16_t reg) {
    int n=0,value=0;
    while((pow(2,n))<=reg){
        value=n;
        n++;
    }
     reg &=(1<<value);
    return  reg;
}

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

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

Solving Approach