Keep Only the Highest Set Bit

Code

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

// Complete the function
uint16_t highest_set_bit(uint16_t reg) {
    // Your logic here
    int j=0,prev=0,i=0;
    int value,current;
    for(i=0;i<16;i++){
        current = reg & 1;
        value= current * pow(2,j);
        j++;
        reg=reg >> 1;
        if(value > prev){
            prev = value;
        }
    }
    return prev;
}

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

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

Solving Approach