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
    for(int i=0;i<16;i++){
        if((reg >> i) == 1){
            reg = 0; // set all bits to zero
            reg |= (1 << i); // assign a high bit back to the leftmost set bit
        }
    }
    return reg;
}

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

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

Solving Approach