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 top_bit;
    int i;
    if (reg ==0) return 0;
    else {
        for (i=0; i<32; i++){
            if (reg & (1 << i)) { // Check if bit n is set
                top_bit = i;
            }
        }
        return (1U << top_bit);
    }
}

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

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

Solving Approach