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
    if (reg == 0) return 0;
    int n = 15;
    while (((reg >> n) & 1) == 0) {
        n = n - 1;
    }
    
    return (1 << n);

    //reg = 1000 1100 0010 0001, (reg >> 15) => n = 15
    //teg = 0000 0000 0000 0000, ()
    //return temp_reg;
}

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

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

Solving Approach