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
    uint16_t pos =0;
    if(reg == 0){
        return 0;
    }
    for(uint16_t i = 0; i <16 ; i++){
        if( reg & (1 << i)){
            pos = i;
        }
    }

    reg =0;
    reg |= (1 << pos);
    
    return reg;
}

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

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

Solving Approach