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
    unsigned int num=0;
    uint16_t reg_final;

    reg_final = (reg == 0) ? 0 : reg_final;

    while(reg!=0){
        if(reg & (1<<15)){
            reg_final = (1<<(15-num));
            break;
        }
        else{
            reg = reg << 1;
            num+=1;
        }
    }

    return reg_final;
}

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

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

Solving Approach