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
    int i,prev,a=0;
    for(i=0;i<16;i++){
        if(reg & (1<<i)){
            prev = reg &(1<<i);
           if(prev>a){
            a=prev;
           }
        }
    }
     return a;
}

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

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

Solving Approach